The flexible drill string is one of the key tools to materialize the high accuracy directional drilling technique.

挠性钻杆是实现高精度定向钻孔技术的关键器具之一。

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The flexible drill string is one of the key tools to materialize the high accuracy directional drilling technique.

挠性钻杆是实现高精度定向钻孔技术的关键器具之一。

youdao