DIN EN 1514-4
法兰及其连接 - PN标识法兰垫片尺寸 - 第4部分:用于钢法兰的波纹、平面或槽形金属及填充金属垫片
Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges
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