Production of mechanical foam by a portable in-line foam proportioner().

A . increases the size of foam bubbles formed B . increases the rate of foam production C . improves the extinguishing properties of foam D . gives the nozzleman more freedom of movement,since it can be placed anywhere in the hose line

时间:2022-09-04 03:30:12 所属题库:救助作业用语题库

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