破冰

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为啥放水??盐水啊!?

It is equipped with what is known as a snow-melting water-sprinkler (融雪用散水装置). It is not a device to lift the ship up, but a device to melt snow. It shoots out pumped-up sea water to melt the snow on top of the the ice, reducing friction (and cushioning) between the ice and the ship, making it easier for the ship to break the ice.

哈哈哈哈哈哈哈哈哈。。yes~! u always need to reduce the friction~