10个数三中二多少组简介：Bayonet manufacturing requires considerable steel smelting technology and manufacturing precision. The Ming Dynasty does not have such conditions now. Even in Europe, which has a certain foundation, bayonets have just started.
Bayonet manufacturing requires considerable steel smelting technology and manufacturing precision. The Ming Dynasty does not have such conditions now. Even in Europe, which has a certain foundation, bayonets have just started.
