When transfer heavy object to a lower level, mine hoist usually USES the way of power braking.

矿井提升机下放重物时，多采用动力制动方式。

youdao

When transfer heavy object to a lower level, mine hoist usually USES the way of power braking.

矿井提升机下放重物时，多采用动力制动方式。

youdao