It's the capacity of one ballast water pump.

MeiMei1027 · 2015-04-02 08:56:33Z

It's the capacity of one ballast water pump.简介

来源: MeiMei1027 于 2015-04-02 08:56:33 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (53 bytes)

回答: the claim of 21840 cubic meter of water per hour " is a bit too 由 reader007 于 2015-04-02 08:34:46

The larger the ship the bigger capacity pumps it has.

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