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.
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。
Direction of movement and hose axis muse lie in one plane to avoid torsion stress.
说明：运动方向与软管轴线应在同一平面内，以避免产生扭曲损坏。
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