电动葫芦第一次吊重物时，应在离地面100mm时停止上升，检查其制动情况

When the first hoist heavy lifting, should stop at 100mm from the ground rises, the braking confirmation integrity check before formal job; operation is completed, the electric hoist hook raised parked in designated positions, chopped power supply, lock switch box.

When the electric hoist is lifted for the first time, it should stop rising when 100mm from the ground, check that its braking condition is confirmed in tact before formal operation;

When lifting heavy objects for the first time, the electric hoist shall stop lifting when it is 100 mm from the ground, check its braking condition and confirm it is in good condition before formal operation; after operation, park the electric hoist at the designated position, lift the hook, cut short the power supply and lock the switch box.