knifer搅土器, 剖土机knifen.刀v.用刀切割knife rest crystals[医] 刀架状晶体, 棺盖状晶体knife-line attack刀切状腐蚀knife type shredder甩刀式茎秆切碎机knife-shaped coin刀币knife-edge effect刀刃效应knife-edge tester刀口仪knife-edge switch刀形开关knife-over-rolln.辊衬刮刀knife-edge cutter尖刃模knife-edge attack刃口蚀缝