operating valve spring的意思|示意

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作用阀弹簧

操作阀簧 ... main discharge valve 总放水阀 operating valve spring 操作阀簧 magneto-operated oil valve 磁铁操纵的油阀 ...

作用阀弹簧 ... Operating valve rod 作用阀杆 Operating valve spring 作用阀弹簧 Operation and business management system 设备经营管理制度 ...