According to design and experience of Marine cooling-water unit, introduce some characteristics of it.
根据船用冷水机组的设计与使用经验，介绍了该机组的特点。
They require through-hull connection to draw cooling water into the unit.
这样他们需要全船贯通的连接使冷水进入到冷气系统里。
They require through-hull connection to draw cooling water into the unit.
这样他们需要全船贯通的连接使冷水进入到冷气系统里。
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