What should I do if the aluminum alloy hand holds the gourd when used in the use of the card chain. Let ’s talk about the solution to the chain of the chain of the gourd card card: the chain hand pull the gourd before using it to check the lifting chain to avoid the chain wrapped together. Replace the new chain; when operating, you must make a constant speed. If you are too fast, you will get stuck in the chain. You must avoid this factor; the chain has stains and wipe the surface clean. The chain chain with severe wear needs to be replaced in time.