?主机    main engine

?主机座,主机台    main engine bed (or seat)

?主机排气    main exhaust

?主排气管    main exhaust

?主给水止回阀    main feed check valve

?主给水阀    main feed valve

?主馈线    main feeder

?主力舰队    main fleet

?主肋骨    main frame

?主发电机    main generator

?主卷扬索    main hauling line

?主船壳    main hull

?主喷射阀    main injection valve

?主桅    main mast

?主构件    main piece

?主电源    main power supply

?主无线电信设备    main radiotelegraph installation

?主桅支索    main rigging

?主舵    main rudder

?主帆    main sail

?主帆升降索    main sail halyard

?主轴    main shaft

?轴[驱动]发电系统    main shaft driven generating system

?主帆脚索    main sheet

?主蒸汽管    main steam pipe

?主操舵装置    main steering gear

?主停止阀    main stop valve

?主开关    main switch

?主配电盘    main switchboard

?主[防火]垂直区域    main vertical zone

?维护,保养    maintenance

?维护说明书    maintenance instruction

?维护手册    maintenance manual

?断续电花点火    make and break (or hammer ) spark ignition

?补给给水    make up feed

?补给给水阀    make up feed valve

?补充给水阀    make up feed valve

?补给阀    make up valve

?厂商证书    maker‘s certificate

?制造证书    maker‘s certificate

?阳模    male mold

?阳转子    male rotor