center-hole bit的意思|示意
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中心位
center-hole bit的网络常见释义
带中心水眼的钻头 ... full-hole rock bit 全断面无岩心钻头 center-hole bit 带中心水眼的钻头 side-hole bit 侧孔钻头 ...
center-hole bit相关例句
The bit is usually a drag bit fitted with either PDC or natural diamond cutting structures, but the core bit is unusual in that it has a hole in its center.
钻头通常属于刮刀型，装备有PDC或者天然金刚石切削齿，但取芯钻头的特别之处在于钻头中心有一孔。