美国有足够的稀土资源，但开采成本高，环保要求多所以就外面便宜买了。制造业外移也是这样。
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy
