Zhou Heng was stunned, he didn't expect that after so many days, he could still remember, but as soon as he said this, Zhou Heng's face was a little embarrassed, how could he seem like he was a murderer?

Zhou Heng smiled at him and said:

"I'm here this time and want to ask, can you make such a hollow needle here?"

"Hollow needles?"

The sentence made the big man stunned, and he hurriedly threw the red-hot iron in his hand back into the stove, took off his heavy gloves, wiped a handful on his apron, and turned back to the shop.

A flock of crows flew over Zhou Heng's head, what does this mean?

Hang yourself here, have you done it or haven't you done it, have you heard of it, or ......

Just when Zhou Heng was thinking wildly, the big man walked back, holding an object in his hand, and Zhou Heng took it and took a look.

It was a triangular needle-like hand, with a complicated pattern around the tail, but the tip was a triangular shape with an oval hole in it, and although the needle tube was thicker, it appeared to be hollow.

Zhou Heng was excited in his heart, if this thing can be done, it means that he can not be constrained by the first aid kit and can configure drugs at will.

Thinking of the syringe in the car, Zhou Heng hurriedly returned the needle to Dahan.

"This is very well made, but what I need is more detailed than this, I can bring the real thing and show it to you?"

When the big man heard this, he quickly nodded.

"It would be nice if there were physical objects."

"Boss Xue brought my box."

Boss Xue didn't speak, turned around and went to the car, took the box down and handed it to Zhou Heng, opened a gap, Zhou Heng groped for a moment and found a metal needle.

This is a lumbar puncture needle, the only stainless steel needle in the first aid kit, which is slightly longer than the needle on an ordinary syringe, but if it is an emergency intravenous bolus, this needle is still quite easy to use, even if it is a puncture intravenous drip is also very good.

The needle is 12 centimeters long, and if it can be done, even if it is shorter.

Without waiting for Zhou Heng to speak, the big man grabbed the needle, picked it up and looked at it, his face was full of shock, his fingers caressed the tip of the needle, he didn't dare to touch it hard, he just pressed the square interface of the needle tail with his fingernails.

"Where did you get this, the workmanship is excellent, the material is also first-class, there are no impurities at all, the toughness is extremely strong, this is not ordinary iron, it should be...... Stainless steel! ”

After saying the last two words, the big man covered his mouth, grabbed Zhou Heng's hand, and retreated directly to the iron shop.

Boss Xue was a little dumbfounded at first, rushed up in three steps and two steps, grabbed Dahan's collar, but Dahan shook his arms and broke free, seeing that Boss Xue wanted to make a move, Zhou Heng hurriedly spoke up to stop him.

"Don't panic, this big brother has no malice."

The big man nodded, looking around warily.

"This fine iron is forbidden to be built in the girder, where did you get this needle?"

Zhou Heng's heart was relieved, and he guessed that it might be because of this, this puncture needle was made of stainless steel, he didn't want such a good material, as long as it could be made into a hollow needle.

"My grandfather left it, I remember he seems to have said that this thing seems to have been brought by an overseas businessman, and there is only one piece in total, I don't want this material, as long as it can be made into this shape, the needle is thicker, and the needle is shorter."

"Are you Langzhong?"

Boss Xue stretched out his thumb and gestured at the shop in the Xinglin Medical Hall diagonally opposite.

"See, the Xinglin Medical Hall is now his, and we will open for business in a few days."

Dahan nodded, "You put away the needle, the drawings are left for me to study, I don't know if I can make it, after all, the toughness of pig iron is insufficient, and I am also trying to forge more elastic objects." ”

Zhou Heng pulled out the drawings behind him, in addition to the hollow needle, several drawings were also unfolded, inside were retractors, dilators, small saws, hemostats, and an ophthalmic cautery hemostat, spread in front of the big man.

"The rest of the equipment is easier, can you see if you can make it?"

Looking at the strange-shaped object, the big man's brain was a little dead, and he grabbed the drawing of the cauterizing hemostat and looked at it repeatedly.

"This is not marked, is there a difference in the material?"

Not to mention that he really asked the point, "Yes, the part of this handle should be patterned, it doesn't need to be beautiful and easy to grasp, the ball in the front section should be made of copper, and the part exposed at the top should be crooked, not at the level of the ball, and the top should be very smooth, without burrs." ”

Dahan listened as he kept drawing on the ground with a charcoal pen, and although he couldn't understand the symbols he marked, he seemed to understand.

"As for the quantity, except for this hemostat, there are two pieces, and the rest will make four pieces each, and as for the hollow needle, you can make twenty pieces first."

Boss Xue was a little anxious on the side, this Zhou Heng is the same for everything, he never asks the price, it is really heartbreaking.

"How many taels of silver do you need?"

Dahan looked at the drawings, "These don't use much iron, just finer, you have to pay more, not counting the hollow needle, these just give three taels of silver." ”

Zhou Heng was stunned for a moment, and glanced at Boss Xue, and the big man looked vigilant.

"What do you mean it's too expensive? I didn't ask you for much money, as for these twenty hollow needles, at least five taels of silver will be asked for you outside, of course, you will pay after you are satisfied with the goods. ”

It seemed that he was afraid that Zhou Heng's business would run away, so he hurriedly rolled up the drawings.

Zhou Heng looked at his movements and his face trembled, what else did he not understand, before Zhou Heng could say anything, Boss Xue would not do it.

"Why are you like this, return the drawings to me, and hide the drawings before you can tell me the price?"

Zhou Heng stopped his movements, and the man directly stuffed the drawings into his arms.

"This son, don't know your surname?"

"My surname is Zhou, and my single name is a constant character, if you have any questions, you can go to the hospital to find me."

"Well, that's good Zhou Gongzi, I'll send it to you when I'm done here, if you need to change it or have something you're not satisfied with, you can come to me, let's do it for three days."

Zhou Heng thought about it for a while, and he really didn't know much about steelmaking for a medical student, but he remembered that he had read the relevant introduction, how to reduce impurities in pig iron and make mature iron, and said after thinking about it for a while.

"All you use is pig iron, just blindly sintering and forging, there are still more impurities, if you install a bellows next to this stove to supplement the blowing, the fire will be more vigorous, the temperature will also increase, and the magazines in the pig iron will be much less."

"What is a bellows?"

Zhou Heng grabbed the charcoal pen beside Dahan and drew a sketch on the ground, and an iron shelf was attached to the stove, on which was a wooden bellows, and there was a mouth connected to the side of the stove.

Zhou Heng gestured at the handle outside the bellows, and said: "Open the bellows in this way, the small door at the handle will be opened, and the air will enter the inside of the bellows. ”

Dahan continued to study Zhou Heng's bellows diagram, although with only a few strokes, he had already understood the meaning.

This thing is very crude, but it definitely solves the problem, he has a sheepskin bag, which is occasionally used to blow air, but that thing is finished after blowing, and this one can be replenished all the time is too practical.

"Thank you Zhou Gongzi for your advice, I'm a rough person who won't say anything, anyway, what you want, I will carefully punch it and send it over, the hollow needle, I try it, with this bellows, it's feasible."

Zhou Heng didn't stay any longer, and the two went directly back to the backyard of the hospital.

As soon as you enter the door, many workers are working in the room, and the most marginal house has been equipped with distillation equipment and large vat for fermentation, iron pipes, steamers, collection barrels and other equipment, all of which have been connected, not to mention that it is really a bit of a small workshop.

In fact, Liu Xiuer's surgery did not use so much alcohol.

However, after this village, there is no chance to hack Liu Renli.

I had a hundred taels of my own, and I renovated and manufactured this workshop until it was operational, but I was so nervous that these glasses and surgical instruments cost eighteen taels of expensive drops.

Zhou Heng's footsteps didn't stop, and he went directly to the second floor, but he didn't expect that all the rooms on the second floor were completed, and Dr. Ma took Desheng and Ah Chang to tidy up, and when he saw Zhou Heng, he hurriedly gave a salute.

"Zhou Gongzi is back."

Zhou Heng nodded, "How is Shopkeeper Huang, can it be improved?" ”