双向竖井贯流式水泵装置
bidirectional tubular pump arrangement with silo
双向双从蹄式制动器
dual two trailing shoe brake
双向双领蹄式制动器
dual two leading shoe brake
双向土钉锚喷式挡土墙
two-way soil nail bolting and shotcrete retaining wall
双向压弯组合式构件
double direction constrictive bending combinatory
双向自增力式制动器
bi-directional-servo brake
双小车集装箱岸边桥式起重机
double-trolley quayside crane
双效并联溴化锂吸收式制冷系统
double-effect parallel-flow LiBr-H2O absorption re