Shijiazhuang Wangxing sewing equipment will serve you wholeheartedly: the cost of making underwear is calculated as follows: Look at how much modal costs a kilogram, how many pairs of trousers can be cut per kilogram, and the wages of workers, thread and electricity are all added. What is divided is the cost! The machines used are four-thread sewing machine, flat sewing machine and three-needle five-thread flat sewing machine.