underground mining safety

• 井下安全

underground mining safety的用法和样例：

例句

1. Can you launch and recover boats safety at all states of the tide and in all weather conditions?
   能否在所有的水流与气象条件下安全出发与召回。
2. The plane with a faulty engine landed with safety with the great steering skill of the pilot.
   发生引擎故障的飞机在飞行员出色的操纵下安全着陆。