背刀，就是用油石或者细砂纸正确地研磨刀具的切削刃部，使刀锋利、平整刃口。采用正确的背刀法可以显著地延长刀具的使用寿命。
背刀车床 Back-Knife Lathes
夹背刀锯 back reinforced knife saw
背刀式液压木工车床 Fully automatic hydraulic backknife lathe
背后插刀 stab in the back
背点棘赤刀鱼 Acanthocepola limbata
刀背缝 princess seam
刀背 [机] knife back ; Spine ; [机] back of tool ; flank surface
背后捅刀子 stab in the back
刀背麝香龟 Razor-backed musk turtle ; Sternotherus carinatus- Razor-backed Musk Turtle ; Razorback Musk turtle ; Kinosternon carinatum
成熟的石器工艺技术加工出典型的端刮器、琢背刀、石镞与雕刻器等典型的细石器组合。
The mature craftsmanship of stone tools also generates typical microlith assemblage such as scrappers, daggers, stone arrowheads and engraving tools.
公司生产的刀具系列有：木工铣刀、合金排钻、锋钢钻头、叉刀、背刀、立轴刀、圆锯片等；
Series produced by the tool are: woodworking cutter, alloy discharge drilling, drill steel front, the fork blade, back blade, vertical knife, circular saw blades, etc.
通过切削试验，分析了切削速度、背吃刀量以及切削液等参数改变时，对切削力及表面质量的影响。
Through cutting experiment, the influence on cutting force and surface quality was analyzed when change the parameters such as cutting speed, back cutting depth and cutting fluid and so on.
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