In sharpening tool cutters there is a shortcut mainly based on the geometric shape, which is not only easy to learn, but also can be very precise.

学习刃磨切断刀完全可以走捷径，以几何形状入手的方法，不但入门快，而且不出偏。

youdao

It found that this kind of wheel has high efficient for sharpening tools. Using this wheel can avoid the tool surface crack due to grinding and reduced the dust in shop.

通过研究发现，浸渗砂轮在刀具刃磨方面是一种非常有效的工具，对于防止刀具表面磨削烧伤和减少车间粉尘污染有其特殊的使用价值。

youdao

By 1911, he had opened his own carpentry and tool sharpening business.

大约在1911年前，他开始经营自己的木工和工具加工生意。

youdao