In this way, the matching of the screw and barrel diameter clearance, with the gradual wear and tear of the a little bit more.
这样，螺杆与机筒的配合直径间隙，随着二者的逐渐磨损而一点点加大。
Using encoder to measure stroke, to do calculation to display coil diameter so that the coil can be guaranteed to align with the centre of uncoiler barrel.
采用编码器测量行程，计算并显示带卷直径，保证带卷对推开卷机卷筒中心。
In accordance with this problem, a new pump of small diameter with double barrel has been developed. Experimental study of the deep pumping process has been conducted and attained a success.
针对这一问题，研究设计新型双筒式小直径抽油泵，进行了深抽采油工艺技术的试验研究，获得了成功，取得了良好的经济及社会效益。
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