防护时间的测定 meaning in Chinese

determination of service life

Determination of service life against chloroethane vapor
氯乙烷蒸气防护时间的测定
Determination of service life against benzene vapor
苯蒸气防护时间的测定
Determination of service life
防护时间的测定
Standard test method for granular activated carbon from coal - determination of service life
煤质颗粒活性炭试验方法防护时间的测定
Standard test method for granular activated carbon from coal - determination of service life against henzene vapor
煤质颗粒活性炭试验方法苯蒸气防护时间的测定

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