... perfect resonance理想共振 perfect rigidity完全刚性 perfectly elastic完全弹性的 ...
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We have perfect testing methods foe metal phase, physical and chemical performance, rigidity and fagging. Those testing methods make all the productions under control in any time.
金相、理化、刚性、疲劳的检测手段完善、齐全，从而使板簧的内在质量时刻处在有效控制中。
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