knife ridge

基本解释

When using knives, should the blade down, the index finger ridge cut by the knife.
在使用刀時，應刀刃曏下、食指按在刀脊上切割。
Die-cutting tool including ruled knives and knife perpendicular to the grain, the two inter-Ridge blade and height.
模切刀包括直紋刀和橫紋刀，兩種紋路的刀鋒又有高矮之分。
The helical ridge cleaning device is arranged in front of an opener, and mainly comprises a cutter shaft and a circular knife welded on the cutter shaft;
所述螺鏇型壟台清理裝置安裝於開溝器正前方，主要由刀軸以及銲接在刀軸上的螺鏇刀組成；
174.129.32.184