boom lock lever 动臂止动手柄
boom lock valve 动臂止动阀
boom cylinder lock 动臂油缸锁
boom hold lock 动臂保持止动
boom raise cylinder lock valve 动臂提升缸止动阀
boom swing lock pin 动臂回转止动销
boom transport lock 动臂运输锁
boom transport lock group 动臂运输锁组件
crutch boom [= boom rest 帆杆榈架; 吊杆榈架
boom socket [= boom step] 杆窝; 杆座; 储存程控
cargo boom {single travelling boom} 吊货杆
centershift lock pin lock position 转盘中心移动锁定销锁止位置
3-boom hydraulic rock drilling jumbo 三臂凿岩台车
a baby boom in the last Year of the Dragon 龙年效应; 狂欢节
additional bending moment on derrick boom 吊杆附加弯矩
adjustable boom 可调吊臂
Anchor Boom 抛锚杆; 穿透式电子显微镜
Articulated Boom 铰链式臂; 铰接动臂
articulated boom platform 曲臂工作台