61 LED street lights in Songjiang, Shanghai, "go to work", illuminating citizens' travel safety roads, the Zhenhua community is close to the river channel, and there are no street lights on the west side of the small door . In order to solve the problem, 61 LED solar street lights were installed on the streets of Yueyang . These solar street lights converted solar thermal energy into electrical energy through photovoltaic panels. During the day, the solar panels charged the batteries, and at night the batteries supplied power to the light sources. , Even for 10 consecutive days of rainy and rainy days, it can be normally illuminated, which is both energy-saving and environmentally friendly, but also economical and practical
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A captive bolt pistol (also variously known as a cattle gun, stunbolt gun, bolt gun, or stunner) is a device used for stunning animals prior to slaughter.
The principle behind captive bolt stunning is a forceful strike on the forehead using a bolt to induce unconsciousness. The bolt may or may not destroy part of the brain.
The bolt consists of a heavy rod made of non-rusting alloys, such as stainless steel. It is held in position inside the barrel of the stunner by means of rubber washers. The bolt is usually not visible in a stunner in good condition. The bolt is actuated by a trigger pull and is propelled forward by compressed air or by the discharge of a blank round ignited by a firing pin. After striking a shallow but forceful blow on the forehead of the animal, spring tension causes the bolt to recoil back into the barrel.
The captive bolt pistols are of three types: penetrating, non-penetrating, and free bolt. The use of penetrating captive bolts has, largely, been discontinued in commercial situations in order to minimize the risk of transmission of disease.
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