压舱 meaning in English

ballasting

So are the motions of a little vessel without ballast tossed about on a stormy sea .
在惊涛骇浪的大海上，一只没有压舱物的小船就是这样颠颠簸簸。
Codes of disinfection for ballast water in entry - exit ships
入出境船舶压舱水消毒规程
The ballast placed in the ship can keep the ship steady
放在船上的压舱物可以保持船的平稳。
How long will you need for deballasting
请问压舱水排放多长时间？
Pig iron used as permanent ballast
压载铁做为永久性压舱物的生铁

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