After a while, Uncle Li took a basket of vegetables, eggs and fruits and sent them to Zhang Tao, Zhang Tao thanked him and accepted the dishes and the like, and returned the basket to Uncle Li. Pen, fun, and www.biquge.info

Put the vegetables and eggs in the refrigerator and store them, wash the fruit with spring water, put it on a plate, and eat it when you are thirsty. Zhang Tao replaced the worn parts of the drone and the pangolin-type drill, and then reassembled the robot.

Two wireless monitors were installed for the eye position of the pangolin drill and the head position of the robot, and the other eye position of the pangolin drill was replaced by a glass ball. The battery is placed at the head of the drill, and several internal amplifier circuits are connected in parallel, and the length of the ultrasonic wave emitted after this gear is 1.71 meters and the width is 1.6 meters.

Then the robot and the pangolin drill were tied to the bottom frame of the two drones with ropes, and the two drones were remotely controlled to fly to the oil field. After flying to the place, let one drone hover in the air and the other drone scout nearby, and at noon it is still relatively hot, and people and animals stay in the shade.

After not discovering the situation, he remotely controlled the drone and flew back to the oil field, allowing the two drones to fly to the ground. The drone with the pangolin-type drill was remotely controlled to remove the drill, and then the driller was remotely controlled to push away the stones blocking the hole entrance.

Then remotely control two drones to fly to a more lush tree branch, fix the bottom frame of the drone with a rope, and then remotely control the pangolin-type drill to drill into the hole and climb into the underground space.

This time there is a wireless monitor, the speed of the space under the bottom is faster, it turns out that it is based on the signal amplifier at the turn of the cave to travel, after the pangolin driller reaches the underground space, Zhang Tao estimates that the air in the hole is full, and the drone with the robot is remotely controlled to fly into the underground space. The other flew to a tree to keep watch.

After the drone flies to the underground space, let the drone fly to the room to be drilled horizontally, Zhang Tao marks the current position of the drone on Google Maps according to the signal frequency transmitted by the drone, and then calculates the straight position of the drone and the villa, and remotely controls the pangolin-type drill to adjust the direction and park against the wall.

Then start the oscillation circuit to adjust the resonance frequency to the frequency of the stone, and then turn on the amplification circuits connected in parallel to emit ultrasonic waves against the wall. After a few seconds, the rocks on the wall called up a lot of rock powder, and a large hole appeared in the wall.

Zhang Tao remotely controlled the robot to shovel out the scattered soil and put it aside, using the resonance frequency wave of the stone to open up the cave is simply an artifact, half a minute can drill a three-meter hole, the robot and the pangolin drill installed with a wireless monitor The speed has also been accelerated. Later, Zhang Tao thought about whether to build a factory to make drills and sell them in the future, so that there would be no need for explosives and excavators to drill tunnels, just use some diesel.

After 20 minutes of drilling, the tunnel was 100 meters long, and the pangolin driller was controlled to emit ultrasonic waves on the right side of the tunnel 90 meters, and then the robot was asked to clean the soil, and after drilling for 10 meters, it stopped.

Zhang Tao was ready to blast a space in the tunnel to load soil, and after drilling the hole of explosives, Zhang Tao remotely controlled the robot and the pangolin-type driller to retreat, let the robot turn on the diesel engine and air pump to add some air to the hole, and then let the machine stop and cool down for a few minutes before working.

After a few minutes, the robot filled up the pangolin drill, then went to the toolbox, grabbed a bag and a lighter, went to the room with the explosives bag, put the bag, and the two explosives bags went to the hole on the right at the end of the tunnel.

Let the robot pull the lead of the two explosive packs into the tunnel, use a lighter to light the lead, after a few seconds the flame above the lead disappears in the screen of the robot monitor, and after a few seconds, some gravel and clods pop out of the hole on the right, it seems that the explosion was successful.

The remote control robot enters the hole and pushes out a few roads to transport the soil, and then continues to open the hole forward, this time the soil is faster, and the main time for opening the hole is used to transport the soil, and the drilling is very fast.

After drilling for a while, Zhang Tao saw that the signal sent back was a little weak, so he remotely controlled the robot to install a signal amplifier in the cave, and drilled the tunnel to the bottom of the villa at half past four in the afternoon.

The longitudinal passage of the tunnel has to be well prepared, Zhang Tao did eye care and rubbed his eyes. Then I made dinner, took a few monkey heads out of the refrigerator and washed them in the kitchen, cut them in half and put them in a bowl, and put some condiments aside.

Scoop out a bowl of rice from the rice bag, wash it, boil it in the rice cooker with spring water, then light the casserole with firewood and coal to the stove, wash a few matsutake mushrooms and cut them into small pieces, pour oil and salt on them, and then put an iron curtain on the casserole, put the monkey's head and condiments on the curtain, and buckle a large basin on the iron curtain as a lid.

After waiting for half an hour, the rice was ready. Zhang Tao took the rag and brought down the casserole heated on the stove and put it on the windowsill, and took down the large basin that was buckled on it, and a burst of fragrant white gas came out, which made Zhang Tao have an appetite.

When the food was cold, Zhang Tao picked up the rice bowl and ate it, and now Zhang Tao's appetite is also larger, and he eats several large bowls of rice before he is full. After eating, I brushed the dishes and chopsticks, and went back to the bedroom to lie on the bed and rest for a while.

Zhang Tao was lying down while thinking about how to drill the longitudinal channel, drilling from the bottom to the top will encounter the aquifer is not easy to deal with, Zhang Tao stood up and picked up the mobile phone to call the boss of the township who sells sand and cement and asked him to send another car of sand and cement.

There is some sand and cement left in the underground space, which can be used to build new ponds. After more than ten minutes, the boss drove the tricycle to bring sand and cement, and Zhang Tao's door opened to let the tricycle in.

"Dude! What are you doing here? The boss asked Zhang Tao after unloading the sand and cement.

"Oh! I want to build two warehouses with more cement and sand. Maybe I'll have to let you send it in the future! Huh!" Zhang Tao said with a smile.

"That's good! Thank you, brother! The boss said with a smile.

"You're welcome!"

Zhang Tao said a few more words to the boss and the workers who came with him, and then sent them to the door, this time the boss did not ask for the fare, and said that the next time he asked for sand and cement, Zhang Tao would be cheaper.