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截面法计算杆件内力的过程中,弯矩剪力正负号的运用对初学者不好掌握,根据多年的教学经验,谈一下弯矩剪力正负号运用的改进措施。
Section method to calculate the internal force of the rod, the use of bending moment shear negative for beginners mastery, based on years of teaching experience, talk about the improvement measures of the moment shear force sign.