- 1.(提升和降级) promotion and demotion 短语和例子
2.(上升和下降) go up and down; 升降车 lift truck; 升降滑车 fall block; 升降机 elevator; jack; hydraulic rope-geared; elevator; cage-lifter; lift; lifter; hoist; 升降率 grade; 升降平台 hoistable platform; 升降桥 lift bridge; 升降输送机 lift and conveyer; 升降台 knee-and-colum; cage assembly; elevating [lifting] platforms; 升降梯 elevator; lift; 升降装置 riser
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