Outdoor furniture - Adjustable deck-chairs - General safety requirements - Mechanical tests and requirements.
室外家具。可调桌椅。一般安全要求。机械试验和要求。
In this article, the safety requirements and the structure in general are analyzed for explosion protected industrial vehicle powered by battery with some samples.
文章分析了防爆型蓄电池式工业车辆的通用防爆结构和安全要求，并通过实例介绍了它们的防爆技术措施和安全要求。
General requirements of safety and technical for underground coal mine. loW voltage power sup...
煤矿井下低压供电系统及装备。通用安全技术要求。
General requirements of safety and technical for underground coal mine. loW voltage power sup...
煤矿井下低压供电系统及装备。通用安全技术要求。
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