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Ⅰ.绪言:民国三十三年,滇缅公路工务局及美国陆军供应处工程部主管人员会告作者,该路沿线木桥甚多,皆须重新设计,增加荷重能力,以配合大量军用车辆行驶之需。关於当地所产木材强度及有关利用问题,希望协助彼等解决。此事既属我等应尽之责任,亦系有价值之研究问题。自三十三年夏
I. INTRODUCTION In thirty-three years of the Republic of China, officials from the Burma Road Works Bureau and the Army Supplies Department will report to the author that there are many wooden bridges along the road that require redesign and load-bearing capacity to accommodate a large number of military vehicles Driving needs. Regarding the strength of timber produced locally and the related utilization issues, I hope to help them solve them. This is not only my responsibility, but also a valuable research issue. Since the summer of thirty-three