Dig machinery is dig with bucket mining above or below the material bearing machine, and load transport vehicles or discharge to heap of yard earthwork machinery. Mining materials mainly are soil, coal, sediment and through the advance loose rocks and minerals.Work device is done directly mining task device. It consists of moving arm, dou lever, the bucket hinged three parts and into. Moving arm ups, dou stem telescopic and bucket with reciprocating double role turning the hydraulic cylinder control.

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