中国火炕的发明和普及，绝对是重大突破，让北方人口密度大大提高。火炕的科技含量很高，想要热效率高，又不中毒，需要专门的技术

来源: thore 于 2026-01-13 04:53:39 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.