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Chapter 159 The most powerful persuasion
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Chapter 161 Alchemy and Chemistry
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... y manufacture copper shell-mounted ammunition. The key is how to ignite the black powder filled in the shell without a reliable primer.
The bottom fire of the early metal shell assembly bomb is generally very sensitive to the impact of mercury sulphuric acid, the trigger is pulled to trigger the striker, and the thunder acid mercury at the bottom of the bullet is activated to ignite the shot and shoot the bullet.
It is a pity that he wants to break his head and can't think of the k ...
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