boom spool assembly  动臂滑阀总成

boom control spool  动臂控制阀芯

boom control valve spool  动臂控制阀芯

boom cylinder control valve spool  动臂油缸控制阀芯

boom valve spool  动臂阀芯

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

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

awning boom  天遮杆; 天篷横梁; 天篷梁; 天篷桁; 天幕桁

baby boom  生育高峰; 小支臂; 生育高峰期

Baby-boom generation  婴儿潮世代

backhoe boom  反铲动臂