其中，车用压缩天然气钢瓶的首次检验、第二次检验为三年一次，第二次检验后每二年进行一次。
Among them, the car with compressed natural gas cylinders for the first time test, a second test for three years, after the second inspection once every two years.
分析了压缩天然气钢瓶拖车的充装压力、牵引车头与钢瓶拖车数量的确定，讨论了汽车加气站流程。
The determination of filling pressure for bottle trailer of compressed natural gas, and determination of amount of tractors and bottle trailers is analyzed.
分析了压缩天然气钢瓶拖车的充装压力、牵引车头与钢瓶拖车数量的确定，讨论了汽车加气站流程。
The determination of filling pressure for bottle trailer of compressed natural gas, and determination of amount of tractors and bottle trailers is analyzed.
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