タイトルまたは説明

Knotted chain in the chain of each ring has a name, so it is better than other chain is more firm, bear greater tension. It is used mainly for safety requirements are relatively high places, such as swing, hanging heavy objects,Knotted chain in the chain of each ring has a name, so it is better than other chain is more firm, bear greater tension. It is used mainly for safety requirements are relatively high places, such as swing, hanging heavy objects,Knotted chain in the chain of each ring has a name, so it is better than other chain is more firm, bear greater tension. It is used mainly for safety requirements are relatively high places, such as swing, hanging heavy objects,