duty service meaning in English

义务劳动强迫劳役

Specification for stop - leak additive for engine coolants used in light duty service
照明装置的发动机冷却剂防漏添加剂规范
Specification for ethylene glycol base engine coolant for automobile and light duty service
汽车和轻载装置乙烯乙二醇基引擎冷却剂规范
Standard specification for glycol base engine coolant for automobile and light - duty service
汽车及轻型设备用乙二醇基发动机冷却剂的标准规范
Standard specification for stop - leak additive for engine coolants used in light duty service
用于照明装置的发动机冷却剂的防漏附加物的标准规范
Standard specification for ethylene glycol base engine coolant for automobile and light duty service
汽车及轻负荷发动机用乙二醇型发动机冷却液

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