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为了参加讨论,本文提出对杆件体系虚功原理的推证方法的意见,给出了虚位移原理及虚力原理的证明。
In order to participate in the discussion, this paper proposes opinions on the method of vouching for the virtual work principle of the rod system, and gives the proof of the virtual displacement principle and the principle of the virtual force.