valve seat

短语词组

短语

• diaphragm valve spring seat [铁路]膜片阀弹簧座
• valve -seat cutter 气门座铣刀
• valve spring seat pin 气门弹簧座销
• ventilator valve spring seat 通风阀簧座
• butterfly valve valve seat 蝶阀阀座
• Safety valve spring seat 安全阀弹簧座
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