Zhou Lang was not at all worried that these artillery technologies would be leaked to other countries.

You know, with the current level of technology.

The countries didn't even understand the bronze.

Not to mention the manufacture of such a strong steel material.

And the ratio of gunpowder is like an alien thing to them.

There is no need to worry about technology leaks.

......

Chapter 1683 of "Zhenguo Silly Shizi" Protect the safety of Wedge Country! I am hitting it in my hand, please wait a moment,

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