stearable assemly
... 导数derivative 导向螺杆钻具stearablea emly 导向器guider ...
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对于连续导向钻具组合来说，由于其弯螺杆的存在，使得其在任何一个瞬态的受力变形都有其独特的特征。
For a continuous steering drill tool assembly, because there is crew in it, any transient forced deformation has its special characters.
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