Abstract: The present application provides a comfortable lightweight bullet-proof and stab-resistant suit and a preparation method thereof. A first aspect of the present application provides a comfortable lightweight bullet-proof and stab-resistant suit, including a sheath and a protection core sheet disposed in the sheath, and the protection core sheet includes a first protection layer, a second protection layer, a third protection layer and a buffer layer which are sequentially stacked together. The bullet-proof and stab-resistant suit provided in the present application has better response protection characteristics in the process of bullet penetration or knife tip stab, and the prepared aramid unidirectional cloth has low areal density, apparent flatness, no bubbles, and excellent softness, so that any bending within 180° can be realized.

Abstract: The present disclosure provides a dummy load control circuit and a lighting device. The dummy load control circuit and a dummy load module are connected in parallel with a power supply input end and the dummy load control circuit includes a first switch circuit having a first switch control module so the first switch is controlled to be turned off when the power supply input end is connected to a triac dimmer, and turned on when the power supply input end is not connected to the triac dimmer, a second switch circuit having a second switch control module controlling on/off of the second switch, and a constant voltage source providing a constant voltage so the dummy load module is turned on when the first switch and the second switch are turned off, and turned off when the first switch and/or the second switch are turned on.

Abstract: A safety relief valve for a high-pressure hydrogen cylinder is provided therein with a compression spring and an adjusting nut. The adjusting nut can move up and down to adjust the pressure of the compression spring to compress a sealing plug, so as to adjust the pressure in the hydrogen cylinder to reach an upper limit of pressure relief, which is convenient. Meanwhile, the safety relief valve is provided therein with a fusible seal. When the temperature is lower than a melting point, the fusible seal solidifies, and the sealing plug keeps a gas outlet sealed to prevent hydrogen leakage. When the temperature is higher than the melting point, the fusible seal melts. When the pressure in the hydrogen cylinder is higher than the set upper limit, the sealing plug is forced to open, and the hydrogen flows from an exhaust hole to a hydrogen collection tube.

Abstract: A safety relief valve for a high-pressure hydrogen cylinder is provided therein with a compression spring and an adjusting nut. The adjusting nut can move up and down to adjust the pressure of the compression spring to compress a sealing plug, so as to adjust the pressure in the hydrogen cylinder to reach an upper limit of pressure relief, which is convenient. Meanwhile, the safety relief valve is provided therein with a fusible seal. When the temperature is lower than a melting point, the fusible seal solidifies, and the sealing plug keeps a gas outlet sealed to prevent hydrogen leakage. When the temperature is higher than the melting point, the fusible seal melts. When the pressure in the hydrogen cylinder is higher than the set upper limit, the sealing plug is forced to open, and the hydrogen flows from an exhaust hole to a hydrogen collection tube.

Abstract: A CT collimator comprising: a first gate and a second gate arranged in parallel on a slide rail, the first gate being fixed to a support rack of the CT collimator via elastic members; an electromagnet system arranged on one of the first gate and the second gate; and a metal plate arranged on the other side of the one of the first gate and the second gate relative to the electromagnet system, one end of the metal plate being fixed on the other of the first gate and the second gate and the other end of the metal plate extending to below the electromagnet system, wherein the electromagnet system is configured to engage the first gate and the second gate via the metal plate when the electromagnet system is triggered.

Abstract: A CT collimator comprising: a first gate and a second gate arranged in parallel on a slide rail, the first gate being fixed to a support rack of the CT collimator via elastic members; an electromagnet system arranged on one of the first gate and the second gate; and a metal plate arranged on the other side of the one of the first gate and the second gate relative to the electromagnet system, one end of the metal plate being fixed on the other of the first gate and the second gate and the other end of the metal plate extending to below the electromagnet system, wherein the electromagnet system is configured to engage the first gate and the second gate via the metal plate when the electromagnet system is triggered.

Abstract: A method of producing a non-lofted fiber veil of an orientable polymer for the production of insulation, e.g. thermal, for blown-in applications, having X, Y and Z vector directions of the fibers comprising, melt blowing the polymer to form molten fibers, having molecules oriented along the length of the fibers, the X vector direction, placing the fibers on a roller spinning at a rate to provide additional orientation of the molecules of the fibers, displacing some said fibers into the Y vector direction, and cooling the fibers while on the roller to form the non-lofted fiber veil. Also included is the product of the method, a blown in insulation, intermediate products, an apparatus and a method of producing a product for blown-in installation.

Abstract: A method of producing a non-lofted fiber veil of an orientable polymer for the production of insulation, e.g. thermal, for blown-in applications, having X, Y and Z vector directions of the fibers comprising, melt blowing the polymer to form molten fibers, having molecules oriented along the length of the fibers, the X vector direction, placing the fibers on a roller spinning at a rate to provide additional orientation of the molecules of the fibers, displacing some said fibers into the Y vector direction, and cooling the fibers while on the roller to form the non-lofted fiber veil. Also included is the product of the method, a blown in insulation, intermediate products, an apparatus and a method of producing a product for blown-in installation.