You see, oil deposits can stretch for miles - but when a drill went straight down, the well was only tapping oil from the immediate vicinity.
你瞧，石油储备区可能延绵数英里，但是当钻头垂直钻入时，油井只能开采到附近区域的一点石油。
You see, oil deposits can stretch for miles - but when a drill went straight down, the well was only tapping oil from the immediate vicinity.
你瞧，石油储备区可能延绵数英里，但是当钻头直接垂直钻入时，油井只会利用到邻接区域的石油。
The use of the tapping chuck is particularly advantageous when working with the quick change system on drilling machines that allows to drill and tap in the same position without centring again.
另一优势的体现在这种快换的装置允许在同一个位置上钻孔或者是攻丝，不需要再做中心的调整。
The drill tool has the advantages of capable of being used for drilling and tapping in a narrow space and the inside of a box part without using other devices, convenience and cost saving.
本发明具有以下效果：不使用其它设备，即可在隘小空间和箱体零件内部进行钻孔和攻丝，方便且节约成本。
With this improvement, it can add the function of screw tapping to the general drill-press by not changing its function of drilling.
在不改变台钻钻孔功能的同时，增加了攻丝的功能。
With this improvement, it can add the function of screw tapping to the general drill-press by not changing its function of drilling.
在不改变台钻钻孔功能的同时，增加了攻丝的功能。
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