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water seal英英字典_water seal剑桥英语解释_water seal柯林斯英文解释_果味酸柯林斯词典
果味酸柯林斯词典

water seal

W 开头单词

柯林斯词典

    water seal

  • 1. N a small amount of water contained in the trap of a drain to prevent the passage of foul smells 水封

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