... carrier: 1:ISO9001.CRCC 2:PATENT XBY type online material carrier:1:ISO9001.CRCC2:PATENT Our company ... and basic structure:Working principle: rotating crank, power through the gear reduction, ratchet direction limit, transfer to drum, ... 5 nylon wheel 6, auxiliary support hook 7, the implementation of the 8 and rail hook 9, sleeper sling, 10 ... single arm, 10 kg/arms3, quality: 72 kg online material carrier