
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

专家解读视频
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
专家解读视频