... manhole ring 人孔加强圈 manhole plate 人孔盖,检查孔盖,人... manhole dog 人孔扣夹,人孔盖压板...
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... manhole plate 人孔盖 manhole plate 人孔盖板 manhole ring 人孔环 ...
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Oil tight manhole plate 油密人孔板
Water tight manhole plate 水密人孔板
cover plate for manhole 人孔盖板
manhole cover plate 人孔盖板
This paper briefs the fractures of fillet weld of manhole reinforcing plate in react ion tower of thermal cracking plant and its repairing welding.
本文简要介绍了热裂化装置反应塔入孔加强板角焊缝的断裂及其补焊情况。
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