Therefore, the strength check of multi-internal force from the cross-section of bar can be resolved by means of mechanical method.
为此，利用材料力学方法可以解决杆件横截面上存在多个内力的强度计算问题。
T. sinensis is easy to be dried, its main drying defects are the initial check and the cross section deformation; 2.
结果表明：香椿木为较易干燥树种，其主要干燥缺陷为初期开裂和截面变形；
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