随着天然气汽车的广泛应用,在高速公路及主干公路沿线已兴建大型燃料充加气站,以满足每天成百上千辆天然气汽车燃料充加的需求。天然气加气站的加气机采用了多种安全措施:燃料容器加满后能自动停止供气;加气完毕软管气压自动下降;如果充气管没有拔下而汽车开走时,充气软管能自 With the widespread use of natural gas vehicles, large fuel filling and gas filling stations have been built along the expressways and trunk roads to meet the demand of filling hundreds of natural gas vehicles every day. The gas filling station of a gas filling station adopts various safety measures: when the fuel tank is full, the gas supply can be automatically stopped; the gas pressure of the hose is automatically decreased after the gas filling is completed; if the gas pipe is not pulled out and the car is driven away, from