(人教版)2016年英语选修六 Unit 4 Listening 课件内容摘要:
人教课标高二 选修 62 1. a is a at to of if at of s in er by er 996er it o to er of o its if we to or go by of in of uy it to 5 oms in on is to be to to if 2. 4. of 6. 8. : _: _ay s to to om in in in a e at in 1989ay 0, 000 990p 00, 000 001p ay of 993p 0 0 001p 0 28 a p。(人教版)2016年英语选修六 Unit 4 Listening 课件
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定。 当 塔吊 塔身 和施工升降机的导轨 与建筑物水平距离大于说明书规定时,应验算附着杆的稳定性,或重新设计、制作,并经技术部门确认,主管部门验收。 在塔式起重机 和施工升降机 未拆卸至允许悬 臂高度前,严禁拆卸附墙杆件。 e 塔式起重机必须按照现行国家标准《塔式起重机安全规程》GB5144 及说明书规定,安装起 重力矩限制器、起重量限制器、幅度限制器、起升高度限制器、回转限制器等安全装置。 f
因此对钢材表面缺陷作了本条的规定。 5. 由于焊接材料不同的生产批号质量往往存在一定的差异,本条对焊接材料的复验作出了明确规定。 该复验应为见证取样、送样检验项目。 6 . 钢管片的防腐标准高,故对防腐涂料、稀释剂和固化剂等材料提出要求。 钢管片制作要求 3. 由于二氧化碳气体保护焊与其他焊接方法相比,有焊接变形小、质量好、生产率高、操作性能好等优点,为保证质量,本条规定了钢管片的焊接方法。 4
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