Song Yingxing was the first to speak:

"Back to Your Majesty, we have successfully developed radar, and we are currently installing radar systems on aircraft and warships."

"Well done, with radar, aircraft and warships can see farther and find targets earlier, and they can also carry out combat missions at night."

Zhou Xian nodded and commented with satisfaction.

"How many planes have been built in front of you?"

Then Zhou Xian continued to ask.

"Da Ming: Spoilers at the beginning Chongzhen, reviving the rivers and mountains" Chapter 346 Da Zhou's luck is in the middle of the hand, please wait a while,

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