diamond boring crown的意思|示意

金刚石钻头 ... 金刚石钻探 diamond drilling 金刚石钻头 adamantine drill; bort bit; carbon bit; diamon bit; diamond bit; diamond boring crown; diamond crown; diamond drill bit; diamond drilling bit; diamond head; diamond impregnated drill; diamond nib; diamond penetrator; diamond-core drill; diamond-mpregnated drill; diamondbit; diamonddrillingbit 金刚石钻针 diamond bur ...