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Chain Drive Case
Chain drive case is an assembly of gearbox and chain drive transfer case. The gearbox inside can rotate both clockwise and anticlockwise, which endows the rotary table with ten gear shafts: five shafts clockwise and the others anticlockwise. Besides, there is a turntable clutch and a brake which prevents the rotation from reversion. The chain drive case is used to transfer motive power to the turntable.
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