机电专业英语 翻译
t necessarily in order of importance levant dates of action by those concerned 3.drafting standard reference,for example,as 1100 4.zone reference system when necessary 5.drawing sheet reference,for example,sheet 1 to 2 6.The partial view is only a part of an object which is projected to the principal projection plane.
1．不必按重要性排序 2．以有关( )进行操作的相关日期为准 3．起草标准索引，例如，按1100 4．必要时启动区位索引系统 5．标明图纸编号，例如，表1 至表2 6．局部视图仅指投影到主投影平板上的一部分物件 抛砖引玉
答：建筑工程供电使用的基本供电系统有三相三线制三相四线制等，但这些名词术语内涵不是十分严格。国际电工委员会（ IEC ）对此作了统一规定，称为 TT 系统、 TN ...详情>>
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