Conan: The Mechanic

"This is Grandpa Guanghua's house," the witch said, walking to the iron gate and taking out a large number of keys from her bosom. "Wow, I remember that the key to Grandpa Guanghua's house is—"

Chiyu and Conan looked at each other in surprise - does this witch actually have the key to someone else's house? It looks like there are many more.

"Don't be surprised," the witch seemed to have eyes behind her back, or she seemed to be able to guess the thoughts of the two. "Many of the followers of Goddess Chayiji are lonely and widowed old people, and it is my duty to help them in time. But sometimes they have difficulty moving or something happens, and they cannot open the door, so I need every grandparent who is inconvenient to move. The key to the house." After the witch finished speaking, the iron door opened in response. "Come in with me."

"Grandpa Guanghua," the witch gently opened the door of the house. "It's me, Ying."

"His Royal Highness," an old voice came from a room. "You are here, please forgive me for not being able to welcome you."

"Grandpa," Ying took off her shoes and walked into the room. Qianyu and Conan also followed. "I am coming."

Inside the house, an old man was trying his best to sit up from the bed, and Ying quickly helped the old man. "Grandpa Guanghua, don't rush to get up. What's wrong with your wheelchair?"

"Originally, as long as you press and hold the forward button, the wheelchair can move forward automatically." Grandpa Guanghua was about to point to the wheelchair, but found something very strange. "Uh, Your Majesty, who are those two children?"

Before the witch could answer, Qianyu had already made a judgment.

"Where is this broken..." Qianyu turned over the wheelchair and said speechlessly. "The transmission wheel is gone! It's good to cut!"

Chiba's fingers pointed to the gap between a shaft and a gear. "Look, there should have been a gear here."

"Is the transmission wheel gone?" Conan immediately came over to check the situation. "This...what's the matter?"

"The transmission wheel is gone?" Grandpa Guanghua was surprised when he heard this. "How is this possible? Was it torn down by someone?"

"Grandpa, when was the last time you used the wheelchair," Qianyu tried to press the operation panel on the armrest of the wheelchair, and found that the engine at the bottom of the wheelchair could still run, and the transmission shaft could also rotate, but because there was no transmission gear, the engine The power cannot be transferred to the wheel at all. "This gear should have been removed, otherwise it would be impossible—" When Chiha tried to put down the wheelchair and looked at the transmission part, she found that there was a lot of dark gray powder on the ground where the wheelchair was before it was moved. "This is?"

No part of the wheelchair should have powder!

"No matter what the powder is, let's collect it." After obtaining permission, Conan took a small plate from Grandpa Guanghua's coffee table and put the powder on the ground into the plate with a tissue. "It may have fallen from someone who stole the gear."

"Don't worry about it, grandpa, do you have spare wheelchair supplies here?" Qianyu looked at the parts of the wheelchair and asked in distress. "Without consumables, unless we can find the person who took the gear, there's nothing I can do."

"There are no spare parts for this wheelchair, because this is a wheelchair made by the Ifo Department for me who was paralyzed to save him 20 years ago." Guanghua said slowly.

"Yifu Department?" Qian Yu was suddenly activated by this surname. "You mean the Ifobu? Can the Ifobu be able to master for a long time?"

"Nengjiu is actually called a master..." Guanghua was slightly surprised, but then returned to normal. "Yes, at least I know that her name is Nengju iffube."

"This is the work of Master Ifukube..." Chiba's expression as she looked at the wheelchair instantly became adoring. "My God... Grandpa, can you give me some time to try and disassemble this ingenious piece of work? If there is any damage, I'll pay you the best possible wheelchair."

"Well—" Guanghua pondered for a moment, then said. "Take it apart."

Qianyu was a little surprised at Guanghua's agreement. "Ah... oh... ok."

"I'm too familiar with your eyes," Guanghua said slowly just as Qianyu unscrewed the screw cap with her hands. "Eighty years ago, when I first met Nohisa, she was fixing a bicycle with those eyes."

Chiba did not answer, but carefully observed the mechanical structure of the wheelchair. The structure of the whole machine is much different from that of a normal wheelchair, but as long as you have a little knowledge of mechanics, you can see the structural advantages of this wheelchair over normal wheelchairs, and the weight is definitely not five to ten kilograms of a normal wheelchair, but three or four. Kilograms to the end.

"..." Conan looked at Chiba, who had already researched the Ifukube's wheelchair to the point of madness, sighed, and turned his head to look at the mysterious powder.

I don't know, I was startled when I saw it - the plate was actually damaged, revealing a hole!

"This!!!" Conan couldn't hide his surprise. He stepped forward to check and saw that the powder had leaked from the hole in the plate to the table, and the amount seemed to have increased.

"Papa!" The sound of the metal falling to the ground reached Conan's ears, and Qianyu was staring blankly at the pool of powder on the ground.

"Thousand feathers!" Conan instantly realized what had happened. "Quickly disassemble the other parts that are connected to the transmission gear and this broken part!"

"What?" Qian Yu was stunned.

"Hurry up and take it down! Otherwise, it's over!" Conan's unquestionable expression made Qianyu do it immediately.

"I'm doing it, but please tell me why?" Qianyu immediately took apart the parts and asked at the same time.

"Xi Ying!" Conan said as he ran out of the room. A minute later, he brought a basin of water and threw all the parts that Qian Yu had removed into the water!

"What are you doing!" Qian Yu was shocked. "It will rust!"

"Didn't you hear me say 'tin plague'?" Conan threw the parts into the water, rinsed them before throwing them aside. "Some of these are tin parts, and these tin parts are infected with tin disease, so they change from normal white tin to gray tin. The gray tin is powdered, so the transmission gear disappears. I also saw the dishes being The powder corroded, and the dish was silver, so I could think of silver white tin."

"Tin plague?" Qianyu disassembled the parts and threw them into the water to wash them before taking them out. "Does the tin epidemic require sub-zero temperatures to appear?"

"Have you noticed that there is a net pocket under the wheelchair for storing things?" Conan was still washing the parts. "There is an ice cream bag in the garbage bag by the table. Judging from the color of the inner material, it is a thermal insulation material. This is obviously a takeaway ice cream~www.readwn.com~ So we can conclude that Grandpa Guanghua once put the bag under the wheelchair. In the net pocket of the merchant, what will be put in the takeaway ice cream of the merchant?"

"Ice cream for takeaway? Low temperature..." Qianyu muttered, suddenly thinking of the answer. "You mean dry ice?"

"Yes," Conan shrugged. "The position of the bag mouth should be just below the transmission gear. The cold air generated by sublimation causes the transmission gear to be frozen, causing the transmission gear to get tin plague."

"What about Grandpa Guanghua's wheelchair?" Ying asked in distress.

"His Royal Highness, can you help me order a new wheelchair?" Guanghua said calmly. "Because it can come for a long time, and because it can go away for a long time, this wheelchair can be regarded as a reincarnation."

. . .

When Ying, Conan and Qianyu left Guanghua's house, Qianyu finally couldn't take it anymore.

"What did Grandpa mean just now?" Qian Yu asked curiously, looking at Conan, who had a smile of successful reasoning on the corner of his mouth.

"On our way in, did you notice a closed shrine in the corridor?" Conan replied with a smile. "There's a smell of vanilla and incense in there."

"You mean—" Qianyu seemed to have guessed the answer.

"Yes, it should be the spiritual seat of Ifukube Nohisa," Conan nodded. "That's the person he values ​​the most."

"Wait...Wait a minute, you're saying that Ifukube is already dead!!!???" Chiba suddenly extracted a terrible news from Conan's words.

"Yeah, after all, if the Ifbei can live for a long time, he should be in his 80s or 90s. It is normal to die."

"Ah..." Qianyu covered her face, her emotional depression was clearly revealed in her voice.