In this way, the matching of the screw and barreldiameter 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。
2
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。
3
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.