Depositors have the protection of the casing side vacuum head and vacuum cups.

保护 套管 存方真空头及真空杯。

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While Roomba is already the world's best-selling vacuum cleaning robot, we continue to make improvements to ensure it is the best on the market and stays at the head of the pack.

尽管Room ba已成为全球最畅销的真空吸尘机器人，我们继续改进以确保它是市场上最好的产品，并保持领先地位。

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Vacuum combined with surcharge preloading is a good method to reinforce soft foundation at bridge-head.

真空联合堆载预压法是一种较好的桥头软基处理方法。

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