Heating boilers. part 1: heating boilers with forced draught burners. terminology, general requirements, testing and marking.
供暖锅炉。第1部分：带强制送风燃烧器的供暖锅炉。术语一般要求试验和标记。
The general technical requirements and testing methods of central junction box for vehicles are introduced.
介绍车用中央电气接线盒的技术要求及试验方法。
The general technical requirements and testing methods of central junction box for vehicles are introduced.
介绍车用中央电气接线盒的技术要求及试验方法。
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