bidirectional movement
双向运动
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Bidirectional movement of fluids greatly improves the reaction velocity between treating liquid, as well as the environment for uniform flow dyeing.
双向液体液流运动，大大提高了处理液之间的反应速度，提高了匀流染色的上染环境。
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