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.

FORBES: The delicate art of sucking up