portable derrick crane 轻便转臂起重机 ; 轻便转臂吊机
boom derrick crane 支臂桅杆起重机
fixed derrick crane 固定式动臂起重机 ; 固定式动臂起重机英文
cable derrick crane 纤缆桅杆式起重机
guy derrick crane 牵索人字起重机 ; 牵索转臂起重机
stationary derrick crane [机] 固定式桅杆起重机 ; 起重机
stiff-leg derrick crane 定腿式人字起重机
shear-leg derrick crane 合撑式起重机
leg derrick crane 定腿式人字起重机
The technical performance parameters, design features and multiple advance techniques adopted in model WD120 derrick crane are presented.
重点介绍WD120型桅杆式起重机的技术性能参数、构造特点及采用的多项先进技术。
Modules are transported offshore on deck barges and lifted into place by derrick or crane barges.
模块用甲板驳船运至海上,并由起重船或浮吊吊入适当位置。
Move the personnel platform slowly and cautiously without any sudden jerking of the crane, derrick, or platform;
缓慢谨慎地移动载人平台,吊车、塔吊或平台不能突然猛拉(突然迅速移动)。
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