Chapter 757: Message

s barrel, although pure iron can ensure its stability, it also increases its weight and maintenance difficulty. Over time, it will rust and is not conducive to heat dissipation after the gunpowder ign...s a perfectly harmonious matter until Su Zhen's words ruined the effect, which made him quite annoyed.This isn't over yet.An official, seeing that Dantai Jing was also about to leave, suddenly spoke u...