PTFE gaskets divided into: pure PTFE gaskets, expanded PTFE gaskets, reinforcing PTFE gaskets, packing PTFE gaskets, etc.
聚四氟乙烯垫片又分为：纯四氟垫片，膨胀四氟，增强四氟，填充四氟等。
Flanges and their joints. Dimensions of gaskets for PN-designated flanges. Part 3: non-metallic PTFE envelope gaskets.
法兰及其接头。PN指定法兰用垫圈的尺寸。第3部分：非金属聚四氟乙烯封装垫圈。
Flanges and their joints. Dimensions of gaskets for PN-designated flanges. Part 3: non-metallic PTFE envelope gaskets.
法兰及其接头。PN指定法兰用垫圈的尺寸。第3部分：非金属聚四氟乙烯封装垫圈。
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