四点弯曲
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4-point bending
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The load factor for 4-point bending test, whose derivation is usually not included in textbooks, is also derived in this paper.
简要地导出了一般教材上较少提及其推导的四点弯曲加载因子。
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