At this time, Mr. Zhao gradually fell into deep thought, only to see him look down at the blackened bullet groove that had been smoked, and muttered to himself:

"But...... Nitrate purification is necessary...... In fact, it is a problem with the halide process, it seems that ...... Or is it better to have a seawater chemical industry...... Well...... This dosage should be appropriate, it's just that the purity of the pill column is not enough......"

In front of everyone's eyes, Mr. Zhao fell into deep thought as he spoke, and his voice gradually deepened, and finally turned into muttering, but at this time the scene was quiet, and everyone seemed to be unwilling to disturb Mr. Zhao's thinking.

"Hey...... Mr. Zhao? Mr. Zhao? ”

"Huh?"

"I mean, the ** we use ourselves should be further improved, after all, only twenty months of shelf life is too short."

Ren Ke looked at Teacher Zhao, who was gradually silent, and reminded him in a low voice.

"Well, you're right, you can make an export model and a self-use model......"

While Mr. Zhao spoke, he looked at Ren Ke and the others thoughtfully, with some appreciation in his eyes, and then raised his head and said loudly to everyone:

"So don't worry, we are improving the chemical purification method, and I promise that in a month, before you go to sea, we will make a new enhanced black ** with higher purity."

Okay, now, there's another good thing to experiment here, and by the way, let's test our enhanced black ** performance again......"

"What's good?"

"What's that?"

"Holy! Is it a grenade @ bullet? ”

"That's right! That's it—"

Teacher Zhao said as he took out a black cylindrical object from his satchel and announced in a high tone:

"Everyone! This is a grenade @ bullet loaded with a large number of reinforced black **, I named it 1657 grenade @ bullet!"

"Teacher Zhao! The name of the five-seven style has been taken up by Boss Luo!"

"Huh? How did Boss Luo use it? ”

"Just now, before you came here, it was this gun in your hand!"

"Boss Luo said that this flintlock pistol is called a 1657 rifle."

"Oh, that'...... This grenade @ bullet is called a 1657 grenade @ bullet! Non-conflicting ......"

"Well, you're always up to ......"

"We're okay."

"Hey! Anyway, shouldn't this grenade @ bomb have a handle? ”

"Yes, maybe like a little pineapple, but how does your grenade @ bomb look like a water cup without a handle?"

"Hey, there's a little tube on top of the cup, what's the principle?"

Everyone gathered around again at once, looking at the black thing in Mr. Zhao's hand and commenting, but no one reached out to pick up the grenade @ bullet.

"Uh, the grenade @ bomb is just as long as you have it, the shape of this thing is just right to hold in one hand, no matter what round and flat it is!"

Boss Luo's answer next to him was reasonable.

"Hehe, Boss Luo, although we are middle school students, we have learned a lot of knowledge over the years!"

"That's it, the reason why the grenade @ bullet is made into a cylinder, isn't it that your old picture is easy to process!"

"Uh...... You're right...... In fact, the main thing is that this shape is easy for us to process......

Okay, I'd like to make it a more handy shape, but let's wait until the metallurgical team has installed the casting line......

Boss Luo immediately admitted his shortcomings very shamefully.

"Well, although it looks like a water cup, it seems to be quite handy to hold......"

So everyone immediately got off the donkey with great interest.

Teacher Zhao nodded when he heard this, and continued to introduce:

"As for the protrusion on the top of this cup, it is a small bamboo pipe, which is to protect the credit, and the pipe is covered with a fire rope made of reinforced black **.

The specific operation is actually very intuitive and simple, before throwing, pull out the small bamboo pipe, then light the fire rope, and then throw it out.

Be careful to wait until the inquisitor is halfway through to throw it out. ”

"Teacher Zhao, do you throw the arquebus halfway through the fire? I'm so scared to blow up my ......."

Some in the crowd expressed concern.

"If you throw it early, if you meet someone on the other side who is calm and quick-eyed, I will throw it back for you!"

The ** in the crowd glanced at each other and said.

"Don't worry, there are still four seconds left to detonate the ** inside!"

Teacher Zhao responded in a timely manner.

"Oh, that's it......"

"Well, that's pretty intuitive, you don't have to count in your mind......"

"This design is very good, you must know that the soldiers we will train in the future, especially the soldiers recruited by Brother Hou, most of them are illiterate, right? Therefore, the operation is simple and intuitive, and it is easy to master. ”

Ren Ke also nodded and said.

"That's right, I'm almost certainly 100% illiterate, and I'm afraid I can't even tell the difference between my left and right hands and feet!"

"yes, so our weapons have to be intuitive and easy to operate, and this grenade @ bullet is ......"

Everyone looked at the grenade in Mr. Zhao's hand @ bullet and talked about it.

"Okay, which of you will try it?"

Teacher Zhao took the opportunity to hand the grenade @ bomb in front of everyone.

Onlookers: "......"

"Okay, then, please stand back and stay away, hey! Don't run out! Before you leave, who will take the fire sickle and help me light the fire rope! ”

Before Mr. Zhao's words fell, a group of people actually ran away and threw Mr. Zhao alone on the beach by the sea.

Hearing Mr. Zhao's shout, ** walked over, but he didn't hold a fire sickle and any ignition in his hand, but took out a lighter from his body and stuffed it into Mr. Zhao's hand and said:

"Mr. Zhao, this lighter is lent to you for old use, remember to return me, this is a supermarket material, it is already very rare, I heard that your old coal dry distillation production is going very well, I hope your old man can quickly make hot oil, produce lighters, I think this thing will definitely be sold at a good price in the new world......

Zhao Xihe took the lighter and responded:

"Don't worry, there are already some pure kerosene, although not much, but there has been a good start, and there will be more and more in the future, as for the kind of lighter you said, it's no problem, with Boss Luo's help, oh, by the way, I still need you to go to sea and bring back the flint."

"Isn't flint flint?"

"Yes, it's a very common thing, and it's also very cheap, as long as you bring that thing back, Boss Luo and I will definitely make a simple lighter, whether it's going to be sold as a commodity or something, I don't know, but when the time comes, the soldiers you will lead will have one, not only convenient for cooking, but also for grenades @ bullets...... Uh, okay, I'm going to throw a grenade @ bomb, or are you watching from the sidelines? ”

Teacher Zhao wanted to say something, but when he looked up, he saw a group of onlookers in the distance quietly waiting for him to throw a grenade @ bomb, so he quickly stopped talking.

"Teacher Zhao, be careful yourself!"

I saw ** put down this sentence and slipped away quickly as soon as he turned around.

Teacher Zhao shook his head and muttered: "You guys...... As for the fear of becoming like this......

So Zhao Xihe waved everyone to stay away, and he stood on the beach and turned around and shouted to everyone:

"Everyone! This is the first reinforced black** metal fragmentation grenade @ bomb in the history of mankind in the New World, and it is up to me to throw it, please remember this day! Witness the arrival of this historic moment! ”

After saying these bold words, I saw that Mr. Zhao immediately lit the fuse with a lighter, and when it was halfway burned, he leaned back towards the sky and waved his arm to throw the grenade @ bomb in the direction of the sea.

In the distance, everyone watched in amazement as the grenade @ bomb swept through the air in a graceful parabola, and then plunged straight into the sea, splashing a small wave.

And then...... Nothing happened.

Nani?

Everyone looked confused, why was there only a bubble and there was no then?

There were no explosions on the sea......

"Alas! Sorry, I threw it early! The fuse is wet with water...... Extinguished ......"

Teacher Zhao spread out his hands, stood on the beach with a somewhat embarrassed expression, and turned back to shout to everyone......