Embedded clamp is the name of a type of work. It is a common name on the workshop production line. It is also called a curved wrist machine, a three-needle chain sewing machine, a three-needle roll seaming machine, an arm-type double-thread loop sewing machine, etc., usually It refers to a process. In the case of tops, it refers to suturing the side bones, and in bottoms, it refers to suturing the outer bones.