
En 1514 Flanges And Their Joints - Dimensions Of Gaskets For Pn Designated Flanges - Part 3: Non Metallic Ptfe Envelope Gaskets
出版:British Standards Institution

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En 1514 Flanges And Their Joints - Dimensions Of Gaskets For Pn Designated Flanges - Part 3: Non Metallic Ptfe Envelope Gaskets
出版:British Standards Institution
專家解讀視頻