经过磨损的不等距螺旋输送辊的螺纹是一条“等变距螺旋线”。

The thread of abraded unequal spiral shifting roller is actually a "uniform increasingly dispersing-ratio spire".

youdao

经过磨损的不等距螺旋输送辊的螺纹是一条“等变距螺旋线”。

The thread of abraded unequal spiral shifting roller is actually a "uniform increasingly dispersing-ratio spire".

youdao