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庆祝本站百度收录突破30万页 广告位8折优惠! ... 井用潜油三相异步电动机通用技术条件 Three-phase asynchronous submersible electric motors for oil well--General specification 永磁式直流伺服电动机通用技术条件 General specification for permanent magnet DC servomotors 线绕盘式直流伺服电动机通用技术条件 General specification for DC servomotors with wounded disc armature ...