compressed gas tank造句

:: The best depth control makes use of a ballast tank which can be variably filled with water or gas ( usually from a compressed gas tank ).
However, many now use a pump of some sort, whether it is a hand pump, an electric pump plugged in or run by a battery pack, or a compressed gas tank containing air or nitrogen.
It's difficult to find compressed gas tank in a sentence. 用compressed gas tank造句挺难的