古罗马建筑大多是混凝土结构的。
所有跟帖:
• 那里富产火山灰,, -tt10- ♂ (0 bytes) () 10/03/2023 postreply 09:29:31
• 还盛产石灰岩……混起来烧一下就成了水泥。 -浅水鱼- ♀ (0 bytes) () 10/03/2023 postreply 09:36:50
• 那里富产火山灰,, -tt10- ♂ (0 bytes) () 10/03/2023 postreply 09:29:31
• 还盛产石灰岩……混起来烧一下就成了水泥。 -浅水鱼- ♀ (0 bytes) () 10/03/2023 postreply 09:36:50
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