2results about How to "Diffusion in time" patented technology

This invention relates to the field of rocket engine testing technology and discloses a method for handling hazardous media, comprising: setting a first and a second field torch above the thrust chamber of the rocket engine, and setting a third field torch below the thrust chamber; the first, second, and third field torches are adapted to ignite the hydrogen-oxygen mixture discharged before the pre-combustion chamber ignites; a fourth and a fifth field torch are respectively arranged to the left and right of the thrust chamber of the rocket engine; the fourth and fifth field torches are adapted to ignite the hydrogen-rich gas discharged after the pre-combustion chamber ignites; both the hydrogen-oxygen mixture and the hydrogen-rich gas are hazardous media. This application, by setting five field torches and using field ignition, can promptly ignite the hazardous media discharged from the thrust chamber outlet of the rocket engine, safely handle the hydrogen-oxygen mixture and hydrogen-rich gas, and meet the safety testing requirements of rocket engines.

This utility model relates to the field of printed circuit board technology and discloses an inner layer edge structure of a circuit board, including: a first edge plate body disposed around the substrate body; a plurality of first flow-blocking beads equidistantly arranged on one or both sides of the edge plate body; and a plurality of second flow-blocking beads equidistantly arranged on one or both sides of the first flow-blocking beads, wherein the protruding area of ​​the second flow-blocking beads is larger than that of the first flow-blocking beads, and a first adhesive flow groove is formed between the first flow-blocking beads and the second flow-blocking beads to accommodate the flow of adhesive. This design can not only significantly reduce the flow velocity of the fluid and effectively prevent it from flowing outside the circuit board, thereby avoiding the problem of insufficient adhesive filling of the board pattern, but also the first adhesive flow grooves of different widths formed between the first and second flow-blocking beads of different sizes are interleaved, which can timely and evenly spread the adhesive of the insulating layer along the first adhesive flow groove, thereby ensuring uniform adhesive filling and reducing the probability of defective products.