flush manhole 中文意思是什麼
flush manhole
解釋
齊平人孔-
Specification for manhole cover assembly, bolted, semi - flush, oiltight and watertight
半埋入式防油防水螺栓連接人孔蓋組件規范 -
Specification for manhole cover assembly, bolted, hinged, semi - flush, oiltight and watertight
半埋入式防油防水螺栓連接的人孔蓋組件規范 -
Standard specification for manhole cover assembly bolted, semi - flush, oiltight and watertight
防油防水半嵌入螺栓連接檢查孔蓋組件標準規范 -
Standard specification for manhole cover assembly, bolted, semi - flush, oiltight and watertight, hinged
防油防水半嵌入螺栓鉸接檢查孔蓋組件
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