※　Basic properties of staple engineer plastic

※　Comparison of plastics long-time working temp

※　Chemical properties of Engineer plastic

※　Bearing material comparision of coefficient of linear 　expansion

※　Anti-gorrosion properties of ZrO2 All-ceramic Bearing

※　Tolerance of bearings

※　Properties comparision of ceramic material

※　Clearance of bearings

※　Properties comparion of all kinds of bearing