这种改进后的方法更为实用。
该方法无需预知螺栓的初始长度，更为实用。
This method is practical because the original length of individual bolt is not needed.
与现有的维护方法相比，更为简洁实用。
Compare with the method be used currently, it is more concision and utility.
方法更为简单、实用。费用较低。
It is a simple and practical way, and also its expense is lower.
方法更为简单、实用。费用较低。
It is a simple and practical way, and also its expense is lower.
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