Drilling with cone( drag) bit in the section.
此段地层采用牙轮（刀）头钻进。
Trying on drilling with high water level and large elevation angle;
在同一铅垂面内，当视线在水平线上方时，视线与水平线的夹角。
An uncle with drilling steel in hand said it was the steel.
有一位手持钢钎的叔叔说，这就是钢。
Drilling is cutting a hole with a drill.
钻削就是用钻头钻一个孔。
The cellar deck is the lower deck on a semisubmersible drilling platform with two decks.
在具有两层甲板的半潜式钻井平台上，它是下甲板。
Most drilling in metal is done with a twist drill.
大多数金属钻孔用的是麻花钻头。
Most drilling in metal is done with a twist drill.
大多数金属钻孔用的是麻花钻头。
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