Su Binglan was interested in these things when he went to earth before, and he also studied them specially.
said, she took out the paper and drew some organs on the paper.
"Look, this one can be raised and lowered, this one can be moved. If we use human power to pull some things, it will be very tiring, but through such an organ method, many things will be easily pulled into the air."
"There is also the launch of a crossbow, you can use the mechanism to launch a powerful crossbow with the least force, and shoot at a long distance."
Su Binglan wrote and drew on the paper while talking to Luo Jinan.
Luo Jinan listened carefully.
He was calm on the surface, but he didn't know that a storm was set off inside.
What kind of person is his wife.
Why would she know this?
This kind of thing is not something ordinary people can know.
Arbitrary Technique, of course he knows Arbitrary Technique.
But the Gongsun family of the government family was killed and no one survived.
There is no more Gongsun clan in this world.
Thinking of this, Luo Jinan felt a deep pain in her heart.
His face turned pale.
"Cough cough..."
Those memories, those blood, he couldn't forget at all.
Hearing Luo Jinan coughing, Su Binglan hurriedly reached out and patted Luo Jinan on the back.
"Are you tired, take a rest, this mold is not in a hurry."
Luo Jinan waved his hand and said, "It's okay."
Su Binglan pouted and said, "You are a stubborn person. You are obviously tired but you say it's okay. You look very pale."
There is no blood at all and looks very weak.
Su Binglan took Luo Jinan's pulse and found that his blood was surging.