formed metal bellows mechanical seal的意思|示意

压力成型金属波纹管机械密封 PTFE-bellows mechanical seal 聚四氟乙烯波纹管机械密封 formed metal bellows mechanical seal 压力成型金属波纹管机械密封 welded metal bellows mechanical seal 焊接金属波纹管机械密封 ..

压力成型金属波纹管机械密封件 ... Meatl bellows mechanical seal|金属波纹管机械密封件 Welded meatal bellows mechanical seal|焊接金属波纹管机械 Formed metal bellows mechanical seal|压力成型金属波纹管机械密封件 ...