Through our professional research and design in structure of needle-bed and cam-board, Specially designed for knitting collar and rib; through the extreme requirements in straightness, flatness and precision of machine parts such as bed- base, guide rail , needle-bed, cam-board and cams. We solved these problems that fabric lines grain is not clear, two edges of collar are different and flatness is not enough. 3945105508525939223-blid-7331003358924345257