"Who said what you thought and listened to you?" After hearing Hua Mian's description of the idea of pulley, the old craftsman touched his chin and asked thoughtfully.

"What it looks like in a book", Hua Mian knows that although this world looks ancient, it is actually very different, the first point is that girls can go to the school with boys to read and write, and there are women working in all walks of life, so you don't have to worry about what books you read.

"As far as I know, books that record this kind of content are not so easy for ordinary people to read."

"Anyway, I'm also a person who has been an Oiran, and there are always more channels to read books than ordinary people", Hua Mian is skilled in lying, if he used to have concerns when he made up these words, now he is completely open his mouth.

Listening to what she said, seeing that the craftsman nodded and didn't waste any more time on this issue, he continued: "It's just that there are many things I heard you say just now that are still too theoretical, and I will make adjustments here if I actually do it......

The old craftsman picked up the branch and drew it on the ground as he spoke, worthy of being a professional, and Hua Mian admired what he said, and he only thought of making a pulley mechanism like the one used in the flying dance for Aster to drive the chain by hand cranking, and the old craftsman could improve it on her basis to use the foot pedal to drive the chain.

"It's best this way, you can get things with your hands free, and it's still an experienced person," Hua Mian exclaimed.

"It's not just that", after listening to Hua Mian's words, the old craftsman continued to draw: "The device you said for serving vegetables, it is too wasteful to only place one, and a wooden box is installed in the opposite position, and only one person can drive the two boxes to be transported up and down."

"But then, if two people are stepping up and down at the same time, won't there be a conflict?" , Hua Mian asked.

"Make a small window in front of each pick-up opening, and hang a bell inside, and when the chain starts to move, the bell is driven, and as long as you hear the bell, you know that someone is using a pulley to deliver food."

"I feel like there's still a problem", Huamian can't say what the problem is, but I always feel that something is missing.

At this time, Chengzi was walking in from the backyard with a craftsman carrying a wooden table, and because he came in upside down, he couldn't see the situation behind him clearly, and almost stepped on the tool that Xiao Wu put on the ground.

"Senior brother, be careful, watch out for my knife, these carved things are very fragile", Xiao Wu snatched his tools back before being stepped on by Chengzi.

"If you're afraid of being stepped on, don't put it on the ground, I don't have eyes behind my back, how can I know what you're doing", Nariko argued not to be outdone.

"You don't look before you walk in?"

"I'm carrying something in both hands, and I'm going to make me look back at what's on the ground?"

"I don't care, it's your responsibility anyway"

……

Listening to their dispute, Huamian suddenly thought of the key question, that is, only after the pulley moves, it can be judged by the sound of the bell, but it can't be found before someone operates it, like the elevator, which can also be controlled by multiple people at the same time, the people on each floor are through the small display screen outside the elevator to get the news of where the elevator is currently located, and the food delivery box can also be used in a similar way? ?

"Install a mirror here and a mirror down there," Hua Mian said, nodding a few places.