ballast (float) valve tray是什么意思 ballast (float) valve tray怎么读
ballast (float) valve tray的英文翻译是什么意思，词典释义与在线翻译
名词 ballast:- any heavy material used to stabilize a ship or airship
- coarse gravel laid to form a bed for streets and railroads
- an attribute that tends to give stability in character and morals; something that steadies the mind or feelings
- a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
- an electrical device for starting and regulating fluorescent and discharge lamps
动词 ballast:- make steady with a ballast
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