日韩精品一区二区亚洲AV观看,楼着胸摸娇喘的小黄文,2020亚洲色噜噜狠狠网站,全黄H全肉细节文玩雏女,亚洲 日韩 色 图网站,性欧美video另类hd尤物,无码爽大片日本无码AAA特黄,日本一区二区在免费,久久国产精品人妻无码,国产精品一区二区三区

全國服務熱線:

+86-25-89611918ext308

Wear Sleeve

Publishdate:2021-06-07 Views:1049

Application: Raw material mill

Technical instruction:  It is adopted by 42CrMo, which is processed with heat treatment and the hardness will be HRC30. To protect the shape without damage, it is dealt with low temperature to backfire, and polish it precisely to assure the accuracy.

Application: Raw material mill

Technical instruction:  It is adopted by 42CrMo, which is processed with heat treatment and the hardness will be HRC30. To protect the shape without damage, it is dealt with low temperature to backfire, and polish it precisely to assure the accuracy.