NINGBO SUPERIOR MACHINERY CO.,LTD was founded in 1992,which is one of the earliest manufacturers of screw and barrel for plastic processing machine in China.We are aiming at serving small-scale corporations during our early business period and we have served more than 1000 small or middle-scale corporations producing various kinds of plastic products so far.This fact has lead to an extensive accumulation of technologicalâ€know howâ€and experience for us.