blade against back刀头对刀背
blade-back tool空档铣刀
a blade in the back深入敌后
back blade[机] 背叶片;后刀片;背叶片
back curved blade后弯叶片
back-blade背叶片
back-blade seal背叶片密封
back saw blade平背锯片;锯条
back of blade叶背