... 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 ...
基于15个网页-相关网页
... 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 ...
基于14个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress