63results about How to "Reduce encroachment" patented technology

A retraction apparatus and method are disclosed that provide optimized access to a surgical site. In one form, a retraction frame has a retraction opening with two sets of blades operating therein. The blades are used to sequentially retract the tissue from about an incision. The sequential retraction of the blades generates only narrow gaps between the blades so that tissue and blood encroachment during the surgical procedure are minimized.

The invention discloses an inclined separated layer solid filling coal mining method for a super thick coal seam, which is suitable for the exploitation of an 'under three' super thick coal seam. The method comprises the following steps: determining the number of inclined separated layers according to the principle that thickness of each separated layer is 2.5-4.5 m; adopting a exploitation sequence that mining layer by layer, and filling at a next row; arranging tunnels and equipment according to the conventional solid filling coal mining method; carrying out a circulating sequence that coal mining firstly, metal nets and bamboo fences paving secondly, and filling finally to complete the filling exploitation of a first mining surface and a first separated layer; meanwhile, mining according to the same filling coal mining method under the shield of a manual false roof formed by the first separated layer at the corresponding position of a second separated layer 4 months after a working face of the first separated layer finishes mining; circulating in the way that the exploitation of one separated layer is performed under the shield of a manual false roof manufactured by an upper separated layer continuously until the whole super thick coal seam is mined out. Through the adoption of the method, resources of the 'under three' super thick coal seam can be utilized, the rock formation movement and earth surface sinking can be effectively controlled; and the recovery ratio is high, the production efficiency is high, the cost is low, and the method has wide practicability in the field of thick coal seam filling exploitation.

The invention belongs to the technical field of enamel material, and specifically relates to a vanadium-titanium enamel glaze material, and a preparation method thereof. The preparation method is used for solving technical problems that cost of a conventional vanadium-titanium enamel glaze material is high, glossiness of enamel glaze obtained via sintering is not high enough, fishscaling is observed, and acid and alkali resistance is not high enough. The vanadium-titanium enamel glaze material is prepared from, by mass, 22 to 28 parts of pretreated vanadium-titanium magnetite titanium separation tailing or vanadium-titanium boundary ore, 20 to 22 parts of feldspar powder, 5 to 8 parts of quartz sand, 24 to 26 parts of borax, 1.5 to 2 parts of sodium nitrate, 3.5 to 5.5 parts of lithium carbonate, 5 to 7 parts of fluorite powder, 0.1 to 0.3 part of sodium fluosilicate, 3 to 5 parts of cryolite, 2 to 4 parts of limestone, 3 to 4 parts of cobalt nitrate, 1 to 2 parts of nickel nitrate, 2 to 3 parts of sodium vanadate, and 1 to 2 parts of antimony oxide. Firm combination of the vanadium-titanium enamel glaze material with carbon steel billet can be realized; acid and alkali resistance is higher than that stipulated by national standard; and the vanadium-titanium enamel glaze material can be used for a plurality of matrixes such as hot-rolled carbon steel and cast iron.

The present invention relates to a micro-rail traffic system including a rail system, a train system and a dispatching control system. The rail system includes a suspended track structure for suspending the train system. The train system includes a carriage and a running mechanism. The carriage is suspended in the track structure by the running mechanism that drives the carriage to run along the track structure. The dispatching control system includes a dispatching control center that controls the train system to operate on the track structure. The micro-rail traffic system provided by the invention is simple in overall structure, convenient to install, disassemble and expand, reduces construction and operation costs, improves adaptability to various complex terrains, minimizes occupancy of original roads, and improves the composite use degree of roads, is convenient for passengers to travel.

The invention relates to a secondary coal-mining method for reversely filling paste in stripes. The secondary coal-mining method is suitable for the safe recovery of coal resources under buildings, railways and water bodies. The secondary coal-mining method comprises the following steps of: determining the range of mining coal under building groups according to regulations, and alternatively partitioning paste filling stripes and recovery stripes in the determined coal mining range; sequentially mining the partitioned paste filling stripes and filling mine-out areas of the partitioned paste filling stripes; and sequentially drilling without section pillar along the two paste filling strips and mining the recovery stripes by a caving method after a filler in the past filling stripes is completely solidified. Under usual conditions, the paste filling stripes are wider, and normal recovery stripes are narrow. By the method, the damage to the surface buildings caused by mining subsidence can be effectively reduced, the safety of coal mining can also be ensured without reserving narrow coal pillars, so that the coal resource is completely recovered; and simultaneously, coal resources utilization of solid wastes such as coal gangues and fly ash is realized.

An apparatus for extinguishing a fire on a stovetop, the apparatus including a container detachably mountable to a microwave positioned above the stove top, the container having a closure movable between an open and closed position on the container. A projection member is connected to the container, the projection member movable with respect to the container between a retracted and extended position. A supply of fire suppressant material is retainable within the container when the closure is in the closed position. A heat responsive actuator is disposed on the container. When the container is mounted to the microwave over a first burner, and the fire on the stovetop actuates the heat responsive actuator, the closure moves to the open position and the projection member moves to the extended position, the projection member forcing a second burner portion of the supply of fire suppressant material toward the second burner.

The invention provides a patrolling car rental robot which comprises a driving device, a self-service car rental device, a sensing and monitoring system and a control system. Intelligently dispatched public bicycle piles are adopted to cope with the traffic tidal phenomenon. The patrolling car rental robot can serve as a mobile public bicycle pile and also has security precaution and management functions.

The invention discloses gangue floating bead thermal-insulation concrete. The gangue floating bead thermal-insulation concrete of each cubic meter is prepared from the following raw materials: 240-310kg of water, 450-650kg of cement, 980-1355kg of coarse aggregate, 250-600kg of fine aggregate, 90-150kg of glass beads, 25-75kg of silica fume and 3.95-7.64kg of a water reducer, wherein the fine aggregate comprises natural river sand and floating beads, the floating beads replace the natural river sand in volume and the volume replacement rate thereof is 0-60%; the coarse aggregate comprises natural pebbles and gangue or fully comprises gangue, the gangue replaces the natural pebbles in volume, and the volume replacement rate thereof is 0-100%. The gangue floating bead insulative concrete prepared has the characteristics of insulating and bearing, is suitable for bearing structures and members of buildings, and can be directly applied to engineering practice.

The invention discloses an embedded interactive multimedia conference paperless terminal, and relates to the technical field of paperless office, the embedded interactive multimedia conference paperless terminal comprises a shell penetrating through a table board, the top of the table board is provided with a matching groove and an opening, the top of the shell is sleeved with a positioning frame,and the positioning frame is located in the matching groove. The shell is provided with a motor and a switch which are connected, two threaded rods are symmetrically arranged on the two sides of theshell, the outer walls of the threaded rods are fixedly connected with two transmission connecting end belt wheels, the motor is fixedly connected with the bottom ends of the threaded rods, the threaded rods are sleeved with nuts in a threaded mode, the nuts are connected with the bottom plate, and the tablet personal computer is arranged on the bottom plate. A back plate and a barrier strip are respectively arranged on two sides of the tablet personal computer. The shell internally provided with the tablet personal computer is directly embedded into the table plate in a penetrating mode, theoccupied table top space is small, the switch is pressed, the motor is started to drive the two threaded rods to rotate, the nut drives the bottom plate to move upwards, and the tablet personal computer stretches out of the shell to be used. After the conference is finished, the switch is pressed again to start the motor to reset the tablet computer.

An orthodontic bracket for receiving an arch wire of orthodontic patients having both primary teeth and permanent teeth, the orthodontic bracket including a pad sized to fit on one of the primary teeth, the pad extending a first distance generally in a longitudinal direction and a second distance generally in a lateral direction, the first distance being greater than the second distance. An eyelet can extend from the pad, the eyelet including an aperture defined through the eyelet, the aperture having a central axis oriented transverse to the lateral direction. The aperture can slidingly receive the arch wire. A method including bonding the pad of the orthodontic bracket to one of the primary teeth of the patient.

The invention relates to an antibacterial composite coating as well as a preparation method and a product thereof. The antibacterial composite coating comprises at least one layer of hydrophilic coating and at least one layer of antibacterial coating, the at least one layer of hydrophilic coating is obtained by photocuring a coating composition containing a host and/or a guest structural unit, the at least one layer of antibacterial coating comprises a guest molecule and/or host modified by antibacterial functionalization molecular, and the at least one layer of hydrophilic coating and the at least one layer of antibacterial coating produce host-guest interactions. The antibacterial composite coating is high in firmness, stability and antibacterial rate, and has good lubricity.

A crystalline silicon ingot is produced using a directional solidification process. In particular, a crucible is loaded with silicon feedstock above a seed layer of uniform crystalline orientation. The silicon feedstock and an upper part of the seed layer are melted forming molten material in the crucible. This molten material is then solidified, during which process a crystalline structure based on that of the seed layer is formed in a silicon ingot. The seed layer is arranged such that a {110} crystallographic plane is normal to the direction of solidification and also so that a peripheral surface of the seed layer predominantly also lies in a {110} crystallographic plane. It is found that this arrangement offers a substantial improvement in the proportion of mono-crystalline silicon formed in the ingot as compared to alternative crystallographic orientations.

The invention discloses an assembly type rotary connection suspended ceiling structure which comprises a hoisting device, a bolt, a hanging piece, a plate hanging piece and a plate fixedly connected with the plate hanging piece, the hoisting device comprises a hoisting rod assembly and a rotary hanging piece, and the rotary hanging piece comprises a first cylinder connecting piece, a second cylinder connecting piece and a cubic connecting piece which are fixedly connected in sequence. A groove used for embedding the first cylinder connecting piece and the second cylinder connecting piece at the same time is formed in one end of the hanging rod assembly, external threads are arranged at the other end of the hanging rod assembly, and the hanging piece comprises a first bent part and a second bent part used for bearing the plate hanging piece. The first bending part is perpendicular to the second bending part, the cubic connecting piece is connected with the first bending part through a bolt, the plate hanging piece is connected with the second bending part, and the space utilization rate is high.