A self - made instrument for measuring time is introduced. The method of measuring time in Milton oil experiment is improved and the result is compared with the method.
本文介绍了一种自制的时间测量仪，利用此仪器改进了密立根油滴实验的时间测量方法并对测量结果和方法进行了比较。
The circuit design principle, calculating formula and assembly technique of self - made WY - 1a multimeter experiment instrument are elaborated.
阐述了自制WY - 1a型万用表实验仪的电路设计原理、计算公式及组装技术。
AIM to observe the biomechanics and histology of minimally invasive bone grafting in the plerosis of bone defects with self-made minimally invasive bone grafting instrument.
目的：应用自行设计的微创植骨器进行微创植骨术修复骨缺损的生物力学和组织学观察。
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