"I just got a call that Hiro-san will be here at 1:00 p.m." she said.
"Oh, about the inventory. Saki, what have you decided?
"I'm interested in mercury and alum."
I'm interested in mercury and alum," I thought Saki would say.
"Alum is fine, but be careful with mercury, okay? That's what I'm going to tell you too, Hiro-san."
"Yeah, I know. Elsa has been threatening me a lot. About mercury poisoning.
That's good.
So, what are you going to do about Jin?
Jin seemed to think for a moment,
"I'm going to use this tap and dice."
"Heh, what's that? What's that?" "It's not a material, is it?"
"Oh. This is a tool to make <>."
A tap is a tool to cut (make) a female screw and a die is a tool to cut (make) a male screw.
There was one more thing that surprised Jin at Mitsuho. That is the existence of .
Since Jin himself has access to engineering magic, he often uses or to fix parts.
However, in Kogun and other places, nails were used for wood and rivets for metal, and wedges were used for fastening.
Even for drilling holes in factories, , which are similar to metal drills in modern Japan, were used instead of .
Jin would like to promote the use of screws in Kogunkuni and other areas in the future, but if the standard differs from that of Mitsuho, it will be troublesome later on, so he thought it would be a good idea to match the Mitsuho standard if it can be done.
"It was terrible to mix inch and millimeter standards. ......"
Even today, some people may have a hard time when they build their own PCs, because many of the parts made in the U.S. are in inches.
As a side note, for some reason, the screws attached to the tips of folding umbrellas and the like are the same standard as those used for camera tripods.
Jin explained the to Saki and Elsa.
"So, by combining the spiral grooves and threads, you can tighten and secure parts?"
"...... but won't it come back?"
To this Hannah replied for some reason.
"You know, there's a thing called "masatsu" that won't loosen easily.
Elsa and Saki were surprised, but so was Jin.
"Hannah! Where did you get that?
"I read about it in a book I read at the library yesterday. I've read about it in a book I read at the library yesterday.
It seems that Hannah's knowledge has reached a considerable level.
(......<, huh? I wish I could do that.)
The magic to send knowledge that No.600012 used on Nidaburu. Then it should be possible to transfer knowledge without using <.
However, the composition of the magic was not told to Jin.
(Maybe No.700672 knows it. ......)
Jin, who is careful not to rely too much on the magic, did not ask, but there is a good chance that he would know it.
(Use it only where you use it, or take Hannah with you instead of teaching her. ......)
"Jin? Jin!"
Saki's voice brought Jin back to himself.
"Oh, oh, sorry, I was just thinking about something."
"Oh, I'm sorry, I was just thinking about something. Let's go have lunch soon, shall we?
Saki said that she would like to have lunch a little early if Emir Hiro would be here at 1:00 p.m.
"...... Actually, I'm just hungry because I didn't eat much for breakfast."
"Erza! I'm not that ...... hungry!"
Saki was upset,
"I'm hungry, too."
Erza came out as well, and Jin couldn't help but laugh.
"Okay, let's go to the cafeteria then."
Since I had never had lunch at the guest house before, I did not know what was on the lunch menu. That made it all the more exciting.
Jin and the others all headed for the dining room.