valve seat

短语词组

短語

• diaphragm valve spring seat [鉄路]膜片閥彈簧座
• valve -seat cutter 氣門座銑刀
• valve spring seat pin 氣門彈簧座銷
• ventilator valve spring seat 通風閥簧座
• butterfly valve valve seat 蝶閥閥座
• Safety valve spring seat 安全閥彈簧座
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