square shank drill [木] 方柄钻
square drill rod 方钻杆
square shank ratchet drill 方柄扳钻 ; 方头钢钻
square drill 方孔钻头
taper square shank twist drill 方锥柄
square-drill 方头钻
kelly bar square drill rod 方钻杆
square-bunch drop drill 方形穴播机
In the region surrounding the densely populated city of Hanoi — with nearly 2,000 people per square kilometre — it is difficult to escape arsenic-contaminated water, no matter how deeply you drill.
在人口稠密的城市周围地区，例如河内——每平方公里达到将近2000人，无论钻入多深的地下水，都很难得到不受砷污染的水源。
In the region surrounding the densely populated city of Hanoi — with nearly 2, 000 people per square kilometre — it is difficult to escape arsenic-contaminated water, no matter how deeply you drill.
在人口稠密的城市周围地区，例如河内——每平方公里达到将近2000人，无论钻入多深的地下水，都很难得到不受砷污染的水源。
To work on individualskills, we especially like to use the square drill, which we can practice inalmost any indoor area with space.
为了提高个人技能，我们特别喜欢使用方阵训练，我们可以在几乎任何室内空间进行练习。
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