Therefore, the pump body and screw cylindrical surface and screw and screw clearance should be as small as possible.
因此，泵体与螺杆外圆表面及螺杆与螺杆间隙应尽可能小些。
2
Interelectrode clearance is one of the most important parameter of it, keeping minimal clearance while machining will improve the part's surface gloss and size accuracy.
There is certain expansion clearance between different parts of boiler and one another which can prevent deformation of heated surface due to restrained expansion.