C259 Amplifier(last Part)

"Alright …" Helian Qi placed the cat powder on the table, picked up the amplifier and said, "This …" There are two holes in the amplifier, the small one for the desired magnification, and the big one for the image amplification. "

"Two holes …" Zhang Tian Shi looked at the amplifier carefully and found that there were indeed two holes, one big and one small. Moreover