maintopn.大桅楼
mainadj.主要的;最重要的n.干线;总管道;[pl](水、煤、电)供应系统;<古>大海
main steam pressure of boiler锅炉主汽压力
main fire alarm control panel主火灾报警控制盘
main gear of slotting machine插齿机主传动机构
Main-lobe shape controlling主瓣控制
main engine overhauling crane主机解体检修用吊车
main feedwater pipe of boiler锅炉主给水管道
main engine operation console主机操纵台
main network switching centre主网交换中心