... retroreflective material 逆向反光材料 reverse bend test of metal 金属反复弯曲试验 reverse bend test 反复弯曲试验 ...
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分析金属制品国标中反复弯曲试验及单向扭转试验方法的书写问题，并对此提出建议。
The article analyzes writing problem of experimental method for reverse bending and torsion in one direction test in national standard of steel wire products, and gives advice to this end.
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