repeated loading and unloading
5.6 The packing of the technical documentations should be strong， suitable for long distance transportation and repeated loading and unloading. Precautions against rain and moisture shall also be taken.
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repeated loading and unloading
反复装卸
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Next, unloading-reloading cycles are repeated in constant loading rate test with Sanjome andesite and Inada granite; and unloading curves at many points along stress-strain curve are obtained.
其次，对三城目安山岩和稻田花岗岩在恒定速率下进行循环加载卸载试验，得到了应力—应变曲线上很多点处的卸载曲线。
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