Rake out the cinders before you start a new fire.
在重新点火前先把煤渣耙出来。
Could you rake out the flower bed?
你可不可以把花床耙一耙？
A study is made on the working Angle in scraping process, practical Calculations are taken up to the Angle of working edge, rake Angle and back Angle. Some patterns of such change are found out.
本文对刮削过程中工作角度问题进行了探讨，并对工作刃倾角、工作前角和工作后角进行了具体计算，得到了一些变化规律。
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