... certificate 2.Reasonable price 3.Delivery on time portable lifting hoist Portable small hoist need the 220 volts ... in the hole, 5 minutes to install.3 the lifting speed :4, easy to operate, safe and reliableWe ... the hole, 5 minutes to install.3 and the lifting speed:4 SEC 1 m, 10 floor 3 ... minutes to play back, with "special tools" the lifting at breakneck speed, and the higher the floor advantage4, ...