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(一)我们的祖先很早就使用了受扭的杆件,如车辆、辘轳和水轮中的轴.古代用水轮带动春米的杵臼和炼铁的风箱,叫做水碓和水排.汉代以来,在《桓谭新论》、《后汉书》、《三国志》、《晋书》;《魏书》、《太平御览》、《王桢农书》、《天工开物》、《农政全书》……等许多古籍中,都有关于水碓、水排或水碾磨的记载.我国有些古书还提到对于车轴的要求和选材问题,早在春秋战国时(公元前四百多年前后),《考工记·輈人》就提出:“轴有三理:一者以为媺也;二者以
(A) Our ancestors used early twisted rods, such as the axles in vehicles, pots and waterwheels, and the ancient waterwheels that used spring rice to drive the rice and the iron bellows of the rice, , In “Huan Tan new theory”, “after Han”, “Three Kingdoms”, “Book of Jin”; “Wei book”, “Taiping Yu Lan”, “Wang Zhennong Shu”, “Heavenly Creations”, “ ... ... and many other ancient books, there are records on the Minamata, water row or water mill some of our ancient books also mentioned the axle requirements and material selection problems, as early as the Spring and Autumn and the Warring States Period (BC 400 years ago) ”Kaogongji · 辀 people“ put forward: ”Axis has three principles: one thinks 媺 also; both