formed l bellows mechanical seal的意思|示意
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成型波纹管机械密封
formed l bellows mechanical seal的网络常见释义
压力成型金属波纹管机械密封 bellows-type mechanical seal 风箱型机械密封 formed l bellows mechanical seal 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 ..