hoisting and lowering中文什么意思

升降钻具

• hoisting:    n. 起重，提升。
• lowering:    adj. 1.卑劣的。 2.体力减弱 ...
• lowering:    adj. 1.(天气)阴霾的，昏暗的 ...

例句与用法

1. The meteorological station was automated in 1992 and scientific assistants were no longer posted at cheung chau . the task of hoisting and lowering of signals was taken over by the property attendants
   一九九二年航空气象站转为自动气象站后，便再没有科学助理当值，只留下产业看管员驻守，负责悬挂风球。
2. The meteorological station was automated in 1992 and scientific assistants were no longer posted at cheung chau . the task of hoisting and lowering of signals was taken over by the property attendants
   一九九二年航空气象站转为自动气象站后，便再没有科学助理当值，只留下产业看管员驻守，负责悬挂风球。