ballasts的精選

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用“ballasts”造句大全，ballasts造句

用“ballasts”造句大全，ballasts造句

2017-06-21
Also,someballastsmanufacturedafter1978containPCBsorthecarcinogenicchemicalDEHP.Usedfortestingthetransistorsofelectronicballasts,energy-savinglamps.Railwayapplications-Rollingstock-D.C.suppliedelectron...