KJV - And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots of many horses running to battle.
ASV - And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots, of many horses rushing to war.
BBE - And they had breastplates like iron, and the sound of their wings was as the sound of carriages, like an army of horses rushing to the fight.
WEB - They had breastplates, like breastplates of iron. The sound of their wings was like the sound of chariots, or of many horses rushing to war.
YLT - and they had breastplates as breastplates of iron, and the noise of their wings `is' as the noise of chariots of many horses running to battle;