China added MP ?Materials and USA Rare Earth as well as ?eight other U.S. entities it said are ?linked ?to the U.S. military to its export control list in retaliation for Washington placing several Chinese companies under restrictions this month.Aveox, a motor manufacturer for mission-critical applications, ?was also among those placed on the list, which halts Chinese dual-use exports to the companies. Pentagon-backed MP Materials, which operates the only active rare earth mine in the U.S., and USA Rare Earth are both involved in the mine-to-magnet supply ?chain.The three U.S. companies were not available for comment outside of business hours....