排放管道和试验阀门体腔内的空气或蒸汽。
Vent the piping and test valve body cavity to remove air or steam.
试验结果表明，各种因素对甲醇发动机的排放都有较明显的影响。
Experimental results show that the effects of these factor; on methanol engine are obvious.
试验结果表明，各种因素对甲醇发动机的排放都有较明显的影响。
Experimental results show that the effects of these factor; on methanol engine are obvious.
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