Hoist (mining)

（重定向自Drum hoist）

In underground mining a hoist or winder is used to raise and lower conveyances within the mine shaft. Modern hoists are normally powered using electric motors, historically with direct current drives utilizing solid-state converters (thyristors), however modern large hoists use alternating current drives that are variable frequency controlled. There are three principal types of hoists used in mining applications:

单词	Drum hoist
释义	Drum hoist 英语百科 Hoist (mining) （重定向自Drum hoist） In underground mining a hoist or winder is used to raise and lower conveyances within the mine shaft. Modern hoists are normally powered using electric motors, historically with direct current drives utilizing solid-state converters (thyristors), however modern large hoists use alternating current drives that are variable frequency controlled. There are three principal types of hoists used in mining applications:
随便看	track levelling and tamping machine的意思 track levelling machine的意思 track lever的意思 track lever locking的意思 track lifter的意思 track lifting的意思 track lifting and lining machine的意思 track lifting and lining tool的意思 track lifting jack的意思 track lifting machine的意思 track light的意思 Track lighting的意思 Track lights的意思 tracklike的意思 track line的意思 trackline的意思 track line of sounding的意思 track liner的意思 tracklines的意思 track lining的意思 track lining device的意思 track lining machine的意思 track lining tool的意思 track link的意思 track link pin的意思