青青青国产精品一区二区_日韩国产综合在线视频_青青热久免费精品视频在,国产精品成年片在线观看_午夜宅宅伦电影网中文字幕_欧美人妻XXXX_亚洲午夜久久多人

News and information

News

The purpose of hob tolerances

2022-02-09 10:34:14 jiangxingTools 2564

The purpose of hob tolerances

The purpose of gear hob tolerances is to assign the tools to a quality class according to their accuracy. On the basis of the gear hob quality classes, the expected gear quality can be forecast. and not all the requirements aimed at a good gear quality in wider sense.