back rake

基本解釋

The cleaning rake moves forth and back in line direction. It is specially suitable for coarse suspensions.
除渣耙做直線往復運動，對于粗大懸浮物去除尤為適用。
PDC cutter size, back rake and density are very important design parameters affecting the performance of PDC bit.
PDC切削齒尺寸、后傾角和布齒密度是影響PDC鉆頭性能的重要設(shè)計參數(shù)。
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.
本文對刮削過程中工作角度問題進行了探討，并對工作刃傾角、工作前角和工作后角進行了具體計算，得到了一些變化規(guī)律。

However, they do give a generous share of their rake back to high volume players and to others indirectly via freerolls and other promotions.
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That would really tip the playing field against high-benefit cards that rake off as much as 3% of sales revenue and hand much of it back to consumers in rebates, air miles or other lagniappe.
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