high-frequency activity area
high-frequency activity area
高频活动区
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The backwashof low frequency, high compressive strength, no powder, no hardening, high activity and large specific surface area, good regeneration effect.
反洗频率低，抗压强度高，不粉化、不板结，比表面积大，活性高，再生效果好。
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