Zhuji City Yinhai Mine Machinery Co., Ltd. is located at Zhuji, Zhejiang province, It was established in the middle of the year of 1982, which is a manufacturer specializing in the copper axial sleeve and copper bush, copper worm wheel, high managa-nese alloy wear resistant steel. It can produce the large copper axial sleeve, copper bush, copper worm wheel. Its unit finished products reaches 3. 5 T, 3500mm diameter, 4000mm long.