我们认为，70mm范围内平面度0.1mm的评价方法是用70mm范围内的法兰面与平板接触，其余平面不与平板接触。

先说翻译
As is konwn to all, the evaluation of plane clearance of 0.1mm within 70mm is using a 70mm flange face contact with an ideal plane, while the other part of don't contact.

这句话本身都错的乱七八糟的。