drill pipe diameter
钻杆直径
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Therefore area array CCD is adopted for the non-contact measurement of the diameter of the abrading section of the drill pipe.
鉴于此，采用面阵CCD对钻杆受磨损部位的直径进行非接触式测量。
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Inside the riser pipe is a space about half a meter in diameter, large enough to hold the spinning drill pipe and bit and to allow the return flow of drilling fluid.
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