关键是钢的强度。比如S90v 这种高强钢材,中国就做不出。并不需要产量太多。
本帖于 2023-12-21 13:37:38 时间, 由普通用户 咲媱 编辑
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