"The four things of thermometers, reflecting telescopes, electron tubes, and underwater breathing apparatus are produced and manufactured by your Ministry of Science and Technology, and kerosene lamps can be invested and produced by private businessmen, which is a good thing for the benefit of the people."

Then Zhou Xian arranged a task for Song Yingxing.

"What's the use of this tube, Your Majesty? It also specifically needs to be produced by our Ministry of Science and Technology. ”

Song Yingxing asked with some doubts, when Ye Fan in the patent office showed the electron tube he invented,

"Da Ming: Spoilers at the beginning Chongzhen, reviving the rivers and mountains" Chapter 157 The establishment of the telegraph office is in the middle of the hand, please wait a moment,

Once the content is updated, please refresh the page again to get the latest updates!