43results about How to "Avoid complex construction" patented technology

It is an object of the invention to provide a technique for further improving the vibration reducing performance in the power tool, while avoiding complicating the construction of the power tool. According to the present invention, a representative power tool may comprise a striker, a tool bit and a vibration reducer. The vibration reducer serves to reduce vibration on the striker by reciprocating in a direction opposite to the reciprocating direction of the striker. The path of the center of gravity of the vibration reducer is arranged to coincide with a path of the center of gravity of the striker. With such construction, because rotating moment is not exerted onto the reciprocating cylinder during the operation of the power tool, vibration reduction can be performed in a stable manner.

An electronic keyboard instrument that emits sounds in both upward and downward directions from speakers solely for upward sound emission and from speakers solely for downward sound emission to realize acoustics similar to that of acoustic piano, and constitutes rear parts of resonance chambers in a speaker box by a common partition plate to prevent the speaker box from becoming complicated in construction. Woofers directed downward are disposed at a lower part of the speaker box, and squawker directed upward are disposed at an upper part of the speaker box. The internal space of the speaker box is partitioned by one horizontal partition plate into an upper space where resonance chambers for the squawkers are defined by vertical partition plates and a lower space where resonance chambers for the woofers are defined by vertical partition plates. Rear parts of the resonance chambers are constituted by the horizontal partition plate.

This breather apparatus has a rotation separator that is fastened to a camshaft, and that rotation separator has a base plate section and a plurality of protruding plates that extend from the base plate section. Moreover, a separator housing is provided in the cylinder head, and comprises an air intake on one end, and an exhaust outlet on the other end. Furthermore, a reed valve that opens and closes by the change in pressure inside a cam chamber is provided in the air intake. Blowby gas that is guided to the cam chamber hits against the protruding plates when passing in the radial direction of the rotation separator, and oil mist is captured by those protruding plates. Continuing, the blowby gas is guided from the cam chamber into the separator housing via the reed valve. When passing through the reed valve, the flow rate of the blowby gas changes, so oil mist is effectively captured by the inner wall surface of the separator housing.

The invention discloses a construction method of a semi-fabricated cast-in-place concrete column. The construction method comprises the steps of 1, integrally and transversely fabricating a reinforcement cage and a steel formwork; 2, carrying out straight-anchorage positioning on a reinforcement cage and steel formwork integrated fabricated structure; 3, supporting the reinforcement cage and steelformwork integrated fabricated structure; 4, mounting a pouring platform; 5, removing integrated connection between the reinforcement cage and the steel formwork; 6, pouring the cast-in-place concrete column; and 7, dismantling the steel formwork. The reinforcement cage and the steel formwork are integrally and transversely fabricated, construction of the reinforcement cage and the steel formworkin a construction site is avoided, and high-altitude operation is avoided; meanwhile, overall hoisting and positioning of the reinforcement cage and the steel formwork are facilitated in the later stage; the pouring platform is arranged at the top end of the reinforcement cage and steel formwork integrated fabricated structure in a sleeving mode, so that the integrated connection between the reinforcement cage and the steel formwork is relieved conveniently, and the concrete pouring work of constructors is facilitated; formwork splicing joints are avoided, no slurry leaks, and the cast-in-place concrete column is poured and formed at a time without construction seams.

An electronic keyboard instrument that emits sounds in both upward and downward directions from speakers solely for upward sound emission and from speakers solely for downward sound emission to realize acoustics similar to that of acoustic piano, and constitutes rear parts of resonance chambers in a speaker box by a common partition plate to prevent the speaker box from becoming complicated in construction. Woofers directed downward are disposed at a lower part of the speaker box, and squawker directed upward are disposed at an upper part of the speaker box. The internal space of the speaker box is partitioned by one horizontal partition plate into an upper space where resonance chambers for the squawkers are defined by vertical partition plates and a lower space where resonance chambers for the woofers are defined by vertical partition plates. Rear parts of the resonance chambers are constituted by the horizontal partition plate.

Provided are a valve controller, an electric gate valve and an electric valve. The valve controller (10) comprises a motor (11); a power transmission unit (12) that transmits driving power of the motor to an external machine; a torque limiter (13) that makes the motor stop when the power transmission unit generates certain load during running of the motor; and a hand-operated handle (14) that applies power onto the external machine through the power transmission unit. The hand-operated handle has a rotatable body that is connected with the hand-operated handle to be a whole body to rotate; a torque drive part that is connected with the power transmission unit; and a friction generation part that enables friction to be generated between the rotatable body and the torque drive part. When torque applied by the hand-operated handle onto the rotatable body exceeds the friction between the rotatable body and the torque drive part, the torque drive part is separated from the power transmission unit and the rotatable body. Therefore, power of transmission to the external machine is limited via operation of the handle when load with the prescribed amount is generated.

The invention discloses a TBM hoisting and translation method for a deep well confined space. The TBM hoisting and translation method for the deep well confined space comprises the steps that S1, deepwell hoisting is carried out; S2, the size and weight of TBM main parts are selected; S3, hoisting personnel are allocated; S4, hoisting machines and tools are prepared; S5, hoisting equipment is selected; S6, a construction site is prepared; S7, the bearing capacity of a foundation is calculated; S8, the load rate is calculated; S9, the crane selection performance is calculated; and S10, hoisting testing is carried out. The construction method solves the problems of deep well hoisting, large weight translation and slag discharge in a confined space in the field of urban rail transit, complexconstruction is avoided, the costs are saved, the construction experience of similar projects is accumulated for enterprises, the technical reserve of the enterprises is enhanced, guidance and reference for urban rail transit construction under similar conditions can be provided, and good promotion, application value and social influence are achieved.

The invention provides a structure of rapidly molded concrete cloth and a laminating method. The structure comprises a concrete base cloth layer and a non-woven cloth layer; a prefabricated cement concrete dry-mixed powder layer is arranged between the concrete base cloth layer and the non-woven cloth layer; the peripheries of the non-woven cloth layer and the concrete base cloth layer are laminated, wound and bonded together in a needling or sewing and knitting manner; a PVC / HDPE waterproof geomembrane layer is laminated on the outer surface of the non-woven cloth layer in a hot melting rolling manner. The concrete cloth is simple and convenient to use, quick in solidification and molding, environmental friendly, high in application flexibility, high in material strength, long in service life, waterproof and flame retardant.

Provided is a fuel tank for a fuel cell and fuel cell system capable of supplying fuel in any direction of installment and processing exhausted substance. The fuel tank is constructed so as to press the fuel (111) to be supplied to the fuel cell main body (200) by pressing a separation plate (130) moving through the inside of a casing (140) by the exhausted substance (123) exhausted from the fuel cell main body. By the above, the fuel can be stably supplied to the fuel cell main body whether the fuel tank for the fuel cell (100) and the fuel cell system (30) are installed in any direction. In addition, since the exhausted substance is utilized for pressing the separation plate, the exhausted substance can be processed.

The invention discloses a reinforcement cage and steel formwork integrated transverse assembly method. The reinforcement cage and steel formwork integrated transverse assembly method comprises the steps: 1, an assembly platform is set up; 2, a first L-shaped steel formwork is hoisted; 3, a reinforcement cage is hoisted; 4, a second L-shaped steel formwork is hoisted and fixedly connected with thefirst L-shaped steel formwork; 5, designated steel bars in the reinforcement cage are selected and marked; 6, a main bar connecting sleeve is mounted and connected with main bar connecting pipes; 7, ajack is inserted and fixedly connected with a steel formwork top sealing plate; and 8, the reinforcement cage and a steel formwork are fixed. Through splicing of the first L-shaped steel formwork andthe second L-shaped steel formwork, the reinforcement cage is placed in the steel formwork and fixed, the subsequent main bar connecting pipes are mounted advantageously by marking the designated main bars, through cooperation of the jack, the main bar connecting pipes, the main bar connecting sleeve and a main bar fixing sleeve, the reinforcement cage and the steel formwork are fixed into a whole, later overall hoisting of the reinforcement cage and the steel formwork is convenient, and thus the construction process is simplified.

The invention discloses a fabricated foam concrete outer wall insulation board, the structure thereof and a mounting method of the fabricated foam concrete outer wall insulation board. The fabricated foam concrete outer wall insulation board comprises a fabricated foam concrete outer wall insulation board body, an external hanging piece, a connecting piece and a wall-hanging piece. When the fabricated foam concrete outer wall insulation board body is mounted, a connecting rod of the connecting piece is inserted into a casing pipe of the external hanging piece, a long hole formed in a bottom plate of the connecting piece and a mounting hole in the wall-hanging piece are connected through a bolt, a wall-hanging hole in the wall-hanging piece is connected with a wall, and finally the space between the fabricated foam concrete outer wall insulation board body and the wall is filled with foam concrete to form a filled layer. A veneer layer and a foam concrete layer of the fabricated foam concrete outer wall insulation board are reinforced mechanically, the fabricated foam concrete outer wall insulation board can be mounted on the building outer wall through the mounting pieces in a fabricated mode, influence of wall matrix is avoided, construction is easy and convenient, the construction period is short, cost is low, and safety is good.

The invention discloses a communication method for multiple electronic detonators with a shared leg wire in the technical field of connection and communication design of electronic detonators. The method comprises the following steps: connecting multiple electronic detonators with different types of preset codes in parallel in the same leg wire; connecting the leg wire with an electronic detonator characteristic reader; respectively transmitting the type codes and characteristic information to the multiple electronic detonators connected to the leg wire in parallel by the electronic detonator characteristic reader; after the electronic detonators connected to the leg wire in parallel receive the type codes and characteristic information, storing the characteristic information and transmitting response information when the type codes transmitted by the electronic detonator characteristic reader are judged to be consistent with preset type codes; disconnecting connection between the leg wire and the electronic detonator characteristic reader after the characteristic information is stored in each electronic detonator which is connected in parallel with the leg wire, and connecting the leg wire into a detonation branch. The communication and recognition problems in the process of sharing the same leg wire among the multiple electronic detonators are solved, the construction convenience is improved, and the miss-fire rate of the electronic detonators is reduced.

The invention discloses a mixed reinforced retaining wall. The mixed reinforced retaining wall comprises an ordinary wall panel, a prestressed wall panel, a wall panel base, non-bonding prestressed tendons, side pressing plates, geogrids and filler, wherein the ordinary wall panel and the prestressed wall panel are supported on the wall panel base; the prestressed wall panel is connected with the non-bonding prestressed tendons; the ordinary wall panel is connected with the grogrids; one or more grogrids are arranged between the two vertical non-bonding prestressed tendons; one ends of the non-bonding prestressed tendons are connected with the side pressing plates; and the other ends of the non-bonding prestressed tendons are stretched and anchored on the prestressed wall panel. According to the mixed reinforced retaining wall, a traditional reinforced soil technology is combined with a non-bonding prestressed reinforcement technology, the filler is passively restrained by reinforced soil fraction through the traditional reinforced soil technology, the active restraint strengthening action, of the non-bonding prestressed reinforcement technology, on the filler is exerted as well, economy of the non-bonding prestressed reinforcement technology is improved, and construction difficulty of the non-bonding prestressed reinforcement technology is reduced as well.

The utility model relates to a novel double steel plate concrete composite wall structure for a bridge tower, which comprises a shear wall system, two ends of the shear wall system are connected with steel-concrete composite columns through high-strength bolts, and the shear wall system comprises two wall steel plates which are arranged in parallel. A plurality of longitudinal partition plates are erected between the two wall body steel plates at intervals in the length direction of the wall body steel plates, the longitudinal partition plates are vertically and fixedly connected to the two wall body steel plates, a plurality of round lightening holes are formed in the longitudinal partition plates, and in-wall concrete is poured between the two wall body steel plates and the longitudinal partition plates. Longitudinal partition plates with lightening holes are arranged in the shear wall system to serve as stiffening ribs, and long studs serve as connecting pieces of a wall steel plate and concrete in the wall, so that the wall can be divided into a plurality of cavities, the construction form is simple, the stress of the connecting pieces is clear, the material consumption is reduced, and the construction cost is reduced. And the strength, ductility, corrosion resistance and fireproof performance of the structure are enhanced.

The invention relates to an adjustable water inlet device for a hydropower station, which is characterized in that the adjustable water inlet device for the hydropower station comprises a spherical strainer, a trumpet water inlet section, a control gate valve, a floating box assembly section, an adjusting section and an elbow pipe section, wherein a floating box is connected to the floating box assembly section; lower parts of the adjusting section and the elbow pipe section are provided with U-shaped floating blocks of a floating pipeline respectively; both sides of the floating box are connected to a mooring line device through steel cables respectively; the adjusting section consists of an upstream spherical universal joint, a downstream spherical universal joint and a connecting pipe which connects the upstream spherical universal joint and the downstream spherical universal joint; and an outlet of the elbow pipe section is connected with a fixed water conduit of a river bank. The adjustable water inlet device for the hydropower station does not require a matched dam project to maintain the underwater embedded depth of a water inlet, does not obstruct a river channel, is favorable for maintaining natural ecology of the river channel, and is widely suitable for the water inlet of a small diversion type hydropower station.

This breather apparatus has a rotation separator that is fastened to a camshaft, and that rotation separator has a base plate section and a plurality of protruding plates that extend from the base plate section. Moreover, a separator housing is provided in the cylinder head, and comprises an air intake on one end, and an exhaust outlet on the other end. Furthermore, a reed valve that opens and closes by the change in pressure inside a cam chamber is provided in the air intake. Blowby gas that is guided to the cam chamber hits against the protruding plates when passing in the radial direction of the rotation separator, and oil mist is captured by those protruding plates. Continuing, the blowby gas is guided from the cam chamber into the separator housing via the reed valve. When passing through the reed valve, the flow rate of the blowby gas changes, so oil mist is effectively captured by the inner wall surface of the separator housing.

The invention provides a processing system and a method of operating the processing system. A coating system 1 comprises a swing station 2 including a swing module and an arrangement of chambers. The arrangement of chambers comprises a lock chamber 3 and a first coating chamber 4. The lock chamber 3 is configured as a combined lock-in / lock-out chamber. The arrangement of chambers has a first substantially linear transport path T1 indicated by dashed lines, and a second substantially linear transport path T2 indicated by dashed lines. The arrangement of the paths T1 and T2 establishes a dual track. The system 1 includes a transport system for moving a substrate through the arrangement of chambers 3, 4 along the first transport path T1 and / or along the second transport path T2 as indicated by arrows. One or particularly both chambers 3 and 4 comprise transfer means for transferring the substrate / carrier from the first path T1 to the second path T2 by a lateral movement of a dual or triple track section and / or from the second path T2 to the first path T1.

The invention discloses a steel formwork and a manufacturing method thereof. The steel formwork comprises first L-shaped steel supporting formworks and second L-shaped steel supporting formworks whichare the same in structure and size, and each first L-shaped steel supporting formwork sequentially comprises an L-shaped steel face plate, a secondary rib layer, a primary rib layer and a reinforcinglayer from inside to outside. The manufacturing method comprises the steps that first, the specifications of the steel formwork are planned; second, the total load borne by the steel formwork is obtained; third, the design deformation amount of the steel formwork is calculated; fourth, a finite element model of the steel formwork is established, and the strength and the deflection of the steel formwork are verified; and fifth, the steel formwork is manufactured. The steel formwork with the four sealed walls is formed by the first L-shaped steel supporting formworks and the second L-shaped steel supporting formworks in an assembled mode, the steel formwork is fastened to the connection positions of the first L-shaped steel supporting formworks and the second L-shaped steel supporting formworks through a plurality of tie bars, through design of double L-shaped transverse pressure-bearing plates, the self weight of the steel formwork is decreased while the lateral pressure is ensured, and a gap between the L-shaped transverse pressure-bearing plates allows the tie bars to be inserted.

The invention provides a switch operating device. The switch operating device comprises a frame (11); a pair of cutting rod bodies (12) axially supported on the front of the frame (11) and forming a cutting part (12a) on the top side; and a cutting slide block (18) driven by a driving mechanism (13) to move and making the cutting part perform switch operations. The device further comprises a pair of clamping rod body (22) located adjacent to the pair of cutting rod bodies, axially supported on the front of the frame (11) and forming a clamping part (22a) located on the top side and side by side with the cutting part; a clamping slide block (23) located adjacent to the cutting slide block (18), slidingly accommodated in the frame (11) and making the clamping part to perform switch operations by moving in the same direction as the cutting slide block (18) does; a force application unit (26) for exerting force on the clamping slide block (23) towards a direction where the clamping slide block performs closing operations to the clamping part; a relative movement limiting unit (30) limiting the relative movement of the cutting slide block (18) and the clamping slide block (23) and banning that the stretching angle of the clamping part is smaller than that of the cutting part.

The invention discloses a reinforcement cage and steel formwork integrated transverse fabrication structure, which comprises a fabricating platform and a jack matched with the steel formwork. A reinforcement cage is placed into a steel formwork, and the top end of the steel formwork is fixedly connected with the jack through a steel formwork top sealing plate; the end, at the top end of the steelformwork, of a main reinforcement in the reinforcement cage is externally provided with an external thread; the two ends of a main reinforcement connecting pipe are provided with external threads correspondingly; the end, at the top end of the steel formwork, of the main reinforcement in the reinforcement cage is in threaded connection with one end of the main reinforcement connecting pipe througha main reinforcement connecting sleeve provided with an internal thread; and the other end of the main reinforcement connecting pipe penetrates through a gap of the jack to be in threaded connectionwith a main reinforcement fixing sleeve provided with an internal thread. Through assembly of a first L-shaped steel support formwork and a second L-shaped steel support formwork, the reinforcement cage is placed into the steel formwork, through cooperation of the jack, the main reinforcement connecting pipe, the main reinforcement connecting sleeve and the main reinforcement fixing sleeve, the reinforcement cage and the steel formwork are fixed into a whole, later overall hoisting of the reinforcement cage and the steel formwork is facilitated, and thus the construction process is simplified.

The invention discloses an integrated horizontal assembly structure of a reinforcing bar cage and a steel formwork, comprising an assembly platform and a top support matched with the steel formwork. Fixed connection, one end of the main reinforcement in the reinforcement cage located at the top of the steel formwork is provided with external threads, both ends of the main reinforcement connection pipe are provided with external threads, one main reinforcement in the reinforcement cage is located at the top end of the steel template and one end of the main reinforcement connection pipe The other end of the main rib connecting pipe is threadedly connected with the main rib fixing sleeve provided with the internal thread through the jacking gap through the main rib connecting sleeve provided with the internal thread. In the invention, the reinforcement cage is placed in the steel template by assembling the first L-shaped steel support template and the second L-shaped steel support template, and the reinforcement cage is assembled by the cooperation of the top bracket, the main reinforcement connection pipe, the main reinforcement connection sleeve and the main reinforcement fixing sleeve. It is integrated with the steel formwork, which is convenient for the overall hoisting of the steel cage and the steel formwork in the later stage and simplifies the construction process.

The invention provides a production process and device for a prestressed carbon fiber plate winding reinforced pipeline. The production process and device are used for solving the technical problem that it is difficult to combine an existing pipeline and a composite material at low cost to improve the internal pressure resistance of the pipeline. The production process comprises the specific steps that S1, the connecting assemblies are installed at the two ends of the lining pipe, and the ribbed rings are sequentially installed on the outer wall of the lining pipe at intervals; s2, winding a carbon fiber plate on the lining pipe; s3, bonding and winding the starting end and the ending end of the wound carbon fiber plate by using fiber composite material cloth for reinforcement treatment, and wrapping and filling the outer side of the wound carbon fiber plate with a protective layer; and S4, an outer frame is installed on the outer side of the protection layer. The carbon fiber plate winding device is used for achieving rapid winding of the carbon fiber plate on the outer wall of the lining pipe, the carbon fiber plate and the lining pipe are tightly combined to form the composite pipeline, and the internal pressure resistance of the pipeline is greatly improved.

The invention discloses a rebar cage and steel formwork integral direct anchoring positioning structure. The rebar cage and steel formwork integral direct anchoring positioning structure comprises a positioning foundation and a rebar cage and steel formwork integrated structure, the rebar cage and steel formwork integrated structure is in direct anchoring fit with the positioning foundation through a lifting appliance, the positioning foundation comprises a raft foundation and a steel formwork positioning frame arranged on a reserved opening in the raft foundation, and the reserved opening ofthe raft foundation is located over a reserved pit of a reserved column sinking foundation. By assembling a first L-shaped steel supporting formwork and a second L-shaped steel supporting formwork, arebar cage is placed in a steel formwork, the rebar cage and the steel formwork are fixed into a whole through cooperation of a top support, a main bar connecting pipe, a main bar connecting sleeve and a main bar fixing sleeve, the mounting position of a raft rebar transversely penetrating through the reserved opening is positioned through a raft rebar positioning frame, collision or blocking generated when the raft rebar is inserted into a rebar cage main bar in a penetrating mode in the later period is avoided, and the position of the steel formwork in the rebar cage and the steel formwork which are integrally connected is positioned through the steel formwork positioning frame, and the construction processes are simplified.

The invention relates to a super high-rise building deep foundation pit which comprises a foundation pit body. The foundation pit body comprises a pit main body excavated in the ground, first fender posts vertically penetrating into the pit main body along the ground and located at the peripheral side of the pit main body, two circles of second fender posts vertically penetrating into the ground along the peripheral side end of the pit main body, water stop piles vertically penetrating into the ground from the position between the two circles of second fender posts and a steel trestle built at the upper ends of the second fender posts and the water stop piles, and mounting bases for fixing the lower end of the steel trestle are arranged at the upper ends of the water stop piles and the second fender posts. The super high-rise building deep foundation pit and the construction method have the characteristics of convenience in foundation pit construction, convenience in steel trestle building and the like.

The invention discloses a construction method of a semi-fabricated cast-in-place concrete column. The construction method comprises the steps of 1, integrally and transversely fabricating a reinforcement cage and a steel formwork; 2, carrying out straight-anchorage positioning on a reinforcement cage and steel formwork integrated fabricated structure; 3, supporting the reinforcement cage and steelformwork integrated fabricated structure; 4, mounting a pouring platform; 5, removing integrated connection between the reinforcement cage and the steel formwork; 6, pouring the cast-in-place concrete column; and 7, dismantling the steel formwork. The reinforcement cage and the steel formwork are integrally and transversely fabricated, construction of the reinforcement cage and the steel formworkin a construction site is avoided, and high-altitude operation is avoided; meanwhile, overall hoisting and positioning of the reinforcement cage and the steel formwork are facilitated in the later stage; the pouring platform is arranged at the top end of the reinforcement cage and steel formwork integrated fabricated structure in a sleeving mode, so that the integrated connection between the reinforcement cage and the steel formwork is relieved conveniently, and the concrete pouring work of constructors is facilitated; formwork splicing joints are avoided, no slurry leaks, and the cast-in-place concrete column is poured and formed at a time without construction seams.

The utility model discloses an overhanging type soft protection safety facility suitable for a high-rise building. Belongs to the technical field of building construction. The device mainly solves the problems that in the high-rise building construction process, high-altitude falling objects need to be prevented, object impact on nearby constructors and corresponding construction facilities is avoided, and high-altitude operation personnel need to be protected, so that the high-altitude falling risk is avoided. The device is mainly characterized by consisting of I-shaped steel, a pre-embedded facility and a protective net mounting facility, wherein the pre-embedded facility is a fixing piece which can be sleeved and used for fixing I-shaped steel, and the pre-embedded facility is anchored into a structural plate of a building floor; the I-shaped steel penetrates into the embedded facility; the protective net mounting facility is provided with a protective net mounting point and mounted on I-shaped steel on the outer side of the structural plate. The utility model has the characteristics that the construction is simple, the load of the I-shaped steel at the overhanging end is reduced, the stability of the overhanging component is improved, and the protection capability is improved, and is mainly used for protecting high-altitude working personnel in the construction process of a high-rise building.

The invention discloses an overall direct anchor positioning structure of a reinforcement cage and a steel formwork, which comprises a positioning foundation and an integrated structure of a reinforcement cage and a steel formwork. It includes a raft foundation and a steel formwork positioning frame arranged on a reserved opening in the raft foundation, and the reserved opening of the raft foundation is located directly above the reserved pit of the subsidence foundation of the reserved column. In the present invention, the first L-shaped steel formwork and the second L-shaped steel formwork are assembled to place the reinforcement cage in the steel formwork, and the reinforcement cage is placed in the steel formwork through the cooperation of the jacking bracket, the main reinforcement connecting pipe, the main reinforcement connecting sleeve and the main reinforcement fixing sleeve. It is fixed with the steel template as a whole, and the raft reinforcement positioning frame is used to locate the installation position of the raft reinforcement that passes through the reserved opening in the transverse direction, so as to avoid collision or obstruction of the raft reinforcement to the main reinforcement of the reinforcement cage in the later stage, and the steel template positioning frame is used for positioning. The position of the steel formwork in the connected steel cage and the steel formwork is optimized to simplify the construction process.