double swing door

常见例句

双语例句

• The original seal structure and the improved seal structure of the double-leaf swing door at the outside end are described.
  介绍了外端双扇摆门的原密封结构和改进后的密封结构，对比分析了硅橡胶条、尼龙毛刷和羊毛毛刷的密封性能。
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