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zi zhi xin kuan tian chuang gu ding qi
Author(s): 
Pages: 72
Year: Issue:  7
Journal: Labour Protection

Abstract: 在燃气管道切接线工程中,手工降压作业确保天窗盖稳固是一个重要步骤,天窗盖是手工作业中在原管线上切割的弧形钢板.手工作业开天窗时,当天窗盖切割圆弧达2/3时,就需要对天窗盖进行稳固,防止切割临近结束时天窗盖受热变形翘起,向内或向外突然脱落.
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