As a result, the Ordnance Warden began to experiment with mixed iron and copper casting.

Although the barrel strength has been strengthened, it will explode after two shells.

And then they kept increasing the proportion of copper.

After another twenty days, they made a cannon out of all copper.

It was found that both in terms of performance and range, it was completely inferior to the artillery produced by the Qinglong Industrial Division.

......

"I'm the King of the Cottage" Chapter 353 Killing with a Knife is hitting in the hand, please wait a moment,

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