激情毛片无码专区,色丁狠狠桃花久久综合网,国产A∨国片精品青草视频,精品无码一区二区三区在线

Application: Widely used to make machine, automotive, chemical and electric equipments parts, such as gear, running pulley, roller, roll shaft, pump impeller, fan blades, high pressure seals, valve seat, gasket, lining, all kind of handle, carriage, wire covering. The materials also can be used as the film packing material, and the medical machine, sports goods and daily suppliers.