The phonograph held a fan, pulled out the fan bones, released steam, and began to train the silk-pulling earrings.
Li Banfeng still felt curious: "Such a small steam engine, what does it burn? Coal?"
The phonograph said: "This is not known for now."
The Portable Residence spoke: "According to my estimation, coal can definitely be burned, other things can also be burned, oil, alcohol, wood, even meals, can all possibly be used as fuel."
Li Banfeng asked again: "Under what circumstances might there be pressure instability?"
The Old Man had studied carefully: "Putting such a large steam engine into such a small object, pressure instability is common; according to my calculations, pressure should be related to the mental state of Inner State People,
anger, resentment, joy, worry, and fear should all cause the pressure to rise rapidly, and at that moment, the valve must be opened to release pressure."
