development the polyurethane wearing ring
10 聚氨酯密封环的研制 Development the Polyurethane Wearing Ring 10 一种新型模糊PID控制的变频恒压供水系统 A New Type Water Supply System With Fuzzy-control Under Va ..
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development the polyurethane wearing ring
开发聚氨酯耐磨环
以上为机器翻译结果，长、整句建议使用 人工翻译 。