pls read what you cited

所有跟贴·加跟贴·新语丝读书论坛

送交者: Latino2 于 2011-03-10, 18:18:36:

回答: 铁犁至少商周就有。你要提供证据。 由 orunmila 于 2011-03-10, 16:53:40:

引用：
An advance on the basic design was the iron ploughshare, a replaceable horizontal cutting surface mounted on the tip of the share. The earliest iron ploughshares date from around 1000 BC in the Ancient Near East,[6] and from ca. 500 BC in China.[7]



所有跟贴:

加跟贴

笔名: 密码: 注册笔名请按这里

标题:

内容: (BBCode使用说明)