Because the aluminum alloy hand pull gourd is used to replace the power accessories at the power at a high altitude, the lighter the weight can facilitate the operation of workers. The 100 -level lifting chain is better than the 80 -level lifting chain. Therefore, the chain 100 chain of the same diameter is well carried, and the diameter of the chain of 100 levels is smaller. The smaller the diameter, the light, so it is used on the aluminum alloy hand to pull the gourd.