兑水 发表于 2009-11-29 10:34:33

ASTM F 1144-1998 防油防水半嵌入螺栓铰接检查孔盖组件

F1144-98(2003) Standard Specification for Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and Watertight, Hinged
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