例句與造句

1. Shaft sinking ; rope suspension gears for load hoisting in shafts ; safety requirements and testing
   鑿井,礦井中起吊負(fù)載的鋼索懸掛齒輪,安全性要求和試
2. Shaft sinking ; chain suspension gears for load hoisting in shafts ; safety requirements and testing
   鑿井,礦井中起吊負(fù)載的鋼鏈懸掛齒輪,安全性要求和試
3. It's difficult to find load hoist in a sentence. 用load hoist造句挺難的