中心钻头

1
centre bit
... centre bit drill 中心钻 centre bit 中心钻头 centre bollard 中心导向滑轮 ...
2
center drill
...钻头钻孔与梯级钻头钻孔 9-3 9-4 9-5 9-6 9-7 9-2 9-1 36 99--22 钻床及搪床钻床及搪床  钻头种类 • 中心钻头(Center drill)：系由一小麻花钻头与60°锥孔铰刀组成，规格以小麻花钻头之直径表示，如图9-42所示。
3
center bit
... cable bitn.冲击钻头,钢绳冲击钻头 center bit中心钻头 bit thrustn.钻头压力,钻头液压推力 ...
4
Center drills for center holes
92 中文名称 中心钻头 英文名称 Center drills for center holes 规格型号 DRILL CENTER R-TYPE_1.6MM DRILL DIAM 品牌/产地描述 中心钻头相关产品 IMPA编号中文名称

短语

1
当钻头上下钻时，要把钻孔保持在中心。
Keep the drill centred in the borehole while it ascends and descends.
《柯林斯英汉双解大词典》
2
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。
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.
3
这样允许钻头围绕岩石的中心圆柱体钻进，并通过钻头进入取芯桶。
This allows the bit to drill around a central cylinder of rock, which is taken in through the bit and into the core barrel.

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