拖链

拖链	tuō liàn	cable carrier (used to protect cables and hoses attached to a machine) / tow chain
拖	tuō	variant of 拖
拖	tuō	to drag / to tow / to trail / to hang down / to mop (the floor) / to delay / to drag on
链	liàn	chain / cable (unit of length: 100 fathoms, about 185 m) / chain (unit of length: 66 feet, about 20 m) / to chain / to enchain