After sleeping for a while, Zhang Tao heard the sound of a car honking, "Drop!" Drip! Drip.... Drip! Someone came to cheer, Zhang Tao opened his eyes vigorously, his luck was indicated, and the clothes on the bed shouted while walking out: "It's coming!" Here it comes! ”

"Boss! Why are you up so late today? The driver poked his head out of the car and said. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

"Oh! Sleep late! Zhang Tao promised as he opened the door and let the bus in. After filling up the bus, some buses came to refuel one after another.

Then there were some agricultural vehicles, cars, and cars coming to the gas station to refuel, and it looked like there were more than yesterday. "It seems that I have to go to the oil company to buy oil, and I only earn less than 200 yuan for a ton of oil in the oil company, and I have to take 200 yuan to do my own activities. If you don't do this, the customer advantage you built up in the early days will be gone, and it will be more difficult to recover it.

It is estimated that other gas stations are also waiting to see their own jokes, in the eyes of others, their behavior is a big sale of money. It seems that we have to study gold mining, and the more you sell oil and cars, the more you lose money. Zhang Tao thought about making a phone call to the oil company and asking the oil company to send four tons of diesel and gasoline.

The 40,000 yuan I had just earned was gone, and it was estimated that the oil I bought could only last for more than a day. Zhang Tao called his parents and asked them to come over, help him collect money for a few days during the day, Zhang Tao was ready to sleep well, and then go to gasoline and diesel at night.

In the afternoon, Zhang Yongzhi and Zhao Yazhen came, and when they saw that there were many vehicles coming into the gas station to refuel, they couldn't help but smile, and even praised Zhang Tao for his ability. Zhang Tao had to laugh and say that he had made money.

After Zhang Tao talked to his parents for a while, Zhang Tao taught Zhao Yazhen and Zhang Yongzhi how to operate the machine in the courtyard, and Zhang Tao slept until eight o'clock in the evening before waking up.

Looking at some of the meals on the table in the house, it is estimated that the parents did not disturb themselves when they saw that they were sleeping soundly. Zhang Tao washed his face, brushed his teeth, and ate the food on the table.

The weather in autumn is still relatively hot, and the food is not cold. After eating and drinking, Zhang Tao loaded four oil barrels on the upside-down donkey, and drove the upside-down donkey towards the forest farm.

Zhang Tao said to let Zhang Yongzhi and Zhao Yazhen watch for himself for two days, Zhang Yongzhi is still at work, can not come to live in the house under the mountain, breakfast can only be bought and eaten, lunch is solved in the unit, get off work early in the afternoon to help Zhao Yazhen collect money, and then take the bus back to the city after eating.

Zhang Tao pulled back and forth four times, and worked until four o'clock in the morning. At four o'clock, there were a few people on the road who got up early to do farm work or exercise, and Zhang Tao could no longer pull oil.

The gasoline and diesel fuel for four trips add up to more than one and a half tons, plus the oil bought at the oil company, you can last for two days without pulling oil. Two days to hurry up, should be able to research the gold mining equipment.

The equipment for drilling is already available, and it is enough to use a pangolin drill, but now all that is needed is the equipment to separate the gold from the associated ore and the stone. Zhang Tao knew that there was a gold mine in the east of Hengdong, and although the gold reserves were not too much, they were still being mined.

Zhang Tao checked the map of the gold mine with his mobile phone and found that the location of the gold mine was next to Lao Maozi's territory. It shows that there is also a gold mine on Lao Maozi's side, and after the equipment for separating the gold mine is made, he will go to Lao Maozi's side to mine gold.

Zhang Tao poured four barrels of gasoline and diesel into the oil storage tank in the backyard, went back to the room to change his clothes, washed them, dried them on the clothes rope, and went back to the house to sleep.

Zhang Tao gave Zhao Yazhen and Zhang Yongzhi the key to the door, and Zhang Tao didn't need to get up again to open the door when it opened in the morning. He slept until noon, and after eating the food on the table, Zhang Tao returned to the house down the hill and was doing research on the gold ore separator in the warehouse.

Gold detectors have been sold since the 20th century, and the principle is very simple. Zhang Tao went to the room and took out a gold key that he had bought before, put the gold key on the table and used a multimeter to test the resistance value of gold, the gold key is 24K, the gold content is 99.9%, and there is no need to worry about the inaccurate instrument made.

Gold's electrical conductivity ranks third among metals, and its resistance is not very high. After testing the resistance value, he did other data tests, and Zhang Tao recorded the data in the book while doing the data test.

After testing the gold, Zhang Tao brought copper wire and silver bracelets to test, and the gold in the gold mine has the properties of being close to copper and silver. I also did tests on stones, soil, etc. According to Hertz's theorem, the frequencies of gold and copper, silver, stone, and earth are calculated.

In the past, the Science and Nature Channel sometimes talked about some minerals, and also talked about testing the frequency, hardness, toughness, etc. of minerals. Zhang Tao also remembered a lot, and calculated while doing tests according to the memory in his mind.

After working until the evening, Zhang Tao felt a little sleepy, and then Zhao Yazhen and Zhang Yongzhi also came back. After the three of them had dinner, Zhang Tao and Zhao Yazhen sent Zhang Yongzhi to the bus, and Zhang Tao went back to the bedroom to sleep.

I woke up the next day feeling much better. After breakfast, Zhang Tao continued to do research, and the resonance frequency of gold and other associated minerals, as well as stones and soil, was tested, and the next step was to make a resonator.

The resonance wave of metal belongs to the category of ultrasound, such as in the hospital, and the ultrasonic lithotripsy machine can shatter the stones in the human body, while the human organs with much lower hardness than stones are not harmed.

Zhang Tao took some leftover circuit boards, capacitors, resistors, inductors, relays, small transformers, CPUs, and memory that he bought on the Internet to the table, first drew a picture with a ruler and a pencil on the drawing, and then used a pencil box ruler to draw small points that needed to be drilled on the circuit board according to the scale of the drawing.

Zhang Tao took the marked circuit board and put it on the drilling machine, and then fixed it with the vice on the drilling machine, and then took out a drill bit with a diameter of 2 mm in the tool kit and put it in the drill bit of the drilling machine, started the drilling machine to lower the speed of the drilling machine, and drilled holes in the marked position on the circuit board.

After the circuit board has been drilled, the drilling machine is stopped and the board is removed. The thin copper sheet was put on and at the same time the drill bit was replaced with a 5 mm drill bit to drill the thin copper sheet, and after the thin copper sheet was drilled, it was removed with gloves and placed on the table to cool.

Zhang Tao returned to the table and filed the burrs drilled into the circuit board with a file and placed them on the table. Then glue the drilled thin copper sheet on the table to stand on the circuit board.

After waiting for half an hour, Zhang Tao touched the copper sheet on the circuit board with his hand, saw that the copper sheet was very strong, and made sure that the copper sheet was firmly glued. Then check the resistors, capacitors and other electronic components on the table with the buzzer gear of the multimeter to see if there is any problem.

Then put it into the small hole on the circuit board according to the position designed on the drawing, and solder and soldering iron to solder the wire on the copper sheet of the electronic components in turn. After the circuit board is made, the next step is to make the ultrasonic generator, and when the ultrasonic generator is ready, the golden resonator is also completed.