"Hypothes of rigid plane", as round shaft distorts, is expounded and proved by use of the elastic theory, thus providing the hypothesis with a theoretical basis and deepened concepts.
本文应用弹性理论，对圆轴扭转时“刚性平面假设”进行了论证，为“刚性平面假设”提供理论依据和深化概念。
A shaft in the box and a box cover wheel without axial or radial clearance is another factor to move, should refer to a box of round renovation measures.
条轴在条盒轮与条盒盖间无轴向或径向间隙是转动不灵的又一因素，应参照条盒轮的整修办法进行。
It is the middle of a slender wooden shaft with a hollow circle at both ends of each round, round a few weeks to open mouth square posts.
它中间有一细腰木轴，两端各连一空心圆轮，轮周开几个方形哨口。
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