ballast

压舱物，[建] 压载物；道渣，碎石英释中释nheavy material that is carried by a ship to make it more steady in the water

给…装压舱物；给…铺道渣中释v

1 electronic ballast,电子镇流器；电子安定器

2 ballast water,压载水；压舱水；压舱配重水

3 in ballast,压舱货；底货

4 ballast tank,压载舱；潜水艇沉浮箱；压载箱；压舱柜

5 water ballast,压舱水，压载水；水压载

6 water ballast tank,压载水舱

7 ballast bed,道床；道碴床；碎石道床；道碴路基