Stephen Coan says a utility worker responding to reports of a gas leak punctured a pipe.
斯蒂芬·科恩表示一名负责报告管道气体泄漏工作人员刺破了管道。
The furnace pipe number, welded joint number and weld worker Numbers...
施焊位置应标注炉管号、焊缝号、焊工号。
The furnace pipe number, welded joint number and weld worker Numbers...
施焊位置应标注炉管号、焊缝号、焊工号。
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