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"How to save how to save?" Everyone around them was also curious.

Hong Dali pointed to the scratches on the ground and said, "Look here, this should be the place where the big turtle rested before, this is always right." But now it's lying underneath, what does that mean? It shows that there should be water underneath, but I don't know what the reason is, the water is suddenly gone, and it was swimming in this underground lake, and then accidentally turned over......"

"Yes, it must be so!" The crowd agreed.

"And then?" Tang Muxin asked.

"Well, then I'll have to ask Hatsune." Hong Dali smiled and took the diving device from the dog's leg: "There must be an underground lake connected here, I remember seeing it before!" So what we need to do now is to go to the underground lake to investigate the situation, and then come back and make a detailed plan! ”

This is arguably the most feasible method at the moment, everyone looks at each other and nods at the same time: "Then do it!" ”

According to the original way, Hong Dali and the others returned to the big snapping turtle again, Hong Dali smiled and patted the glans of the big snapping turtle again: "Big turtle, hehe, see if we stay for a while, I'll save you, don't worry!" ”

"Aang—" the snapping turtle said.

"Good! Understand! Hong Dali snapped his fingers: "Then let's start here, I, Brother Hui and Hatsune, let's go down and have a look, and the others stay here and contact at any time." ”

"Dali, don't take any chances!" Tang Muxin said hurriedly.

"Don't worry! I'm very watery! Hong replied with a smile.

Because there are only three sets of diving equipment, only three people can go down. Hong Dali, Lin Chuyin and Twilight looked back at the three of them immediately found a corner to replace the diving equipment, and the replacement was quickly completed. Lin Chuyin handed a communication device to Tang Muxin, and said lightly: "Contact device." Call at any time. ”

"Good...... What a shame! Tang Muxin nodded fiercely.

"Wow haha! Let's get into the water! "Underwater adventure, I'm coming!

Speaking of which, the diving device made by Lin Chuyin is indeed quite powerful.

There is an oxygen system on the back, which is enough for a person to breathe underwater for thirty minutes, and at the same time, because of the existence of the sci-fi style helmet, it makes it possible for the three of them to communicate underwater - as the strongest technology nerd, Lin Chuyin chose physical line communication equipment underwater, which can effectively avoid signal interference.

So after Hong Dali and the three of them went into the water, there was basically no difference from being on land. The only difference is that the water pressure is a little high, which makes it a little difficult to breathe.

The three of them dived all the way to the bottom of the pool, and it didn't take long for them to come into contact with the bottom of the pool. The water is not too deep, but in the water, you can feel that this water is not stagnant water, but living water, and there are occasionally some small fish and shrimp in the water.

"Be careful, everyone." Twilight looked back and whispered, "It seems to be connected to an underground lake, so be careful of any unknown creatures in the water." ”

This animal has a way to live for a long time, it is easy to approach the monster, the first time he saw the tuna that weighed more than 800 kilograms from the sea, you need to know that this thing is only a few catties normally. More than 800 catties, it's not too much to say that it's a monster.

This underground lake has not been noticed for many years, and there is something in the water. It's hard to say.

"Eun," Hong replied. After that, he used the underwater lighting device in his hand to take a look around: "It seems to be very deep here, Hatsune." Can you calculate how many meters deep? By the way, how long can we dive? ”

Lin Chuyin's voice soon came: "According to the consumption of the compressed air cylinder, the volume of the compressed air cylinder I prepared is fifteen liters, and the diving time = [cylinder volume (liters) * (inflation pressure - signal valve indication pressure)] / [atmospheric pressure per minute * (1 + 0.1 * diving depth) * 0.098]. ”

Hong Dali said wildly: "That, Hatsune, you just say the result, I don't understand it at all!" ”

"Hmm," Lin Chuyin quickly calculated: "0.098 is the density of fresh water, and the approximate value of 1 is generally used, which is ignored." 1 refers to an atmosphere of pressure on land, currently diving for two minutes, consuming nearly one-fifteenth of the compressed air, according to the formula, we can dive for 27 minutes, the current water depth is close to 16 meters. ”

Hong nodded vigorously and said, "Well, at a depth of about sixteen meters, twenty-seven minutes, that means that we can only advance for fifteen minutes at most before we have to go back, right?" ”

"Yes, yes." Lin Chuyin said: "According to the map I deduced, we need to continue to walk forward for another twenty meters, and we can see the interface of the underground lake. ”

"That's good, that's good." Hong Dali suddenly laughed: "Wow, what a big fish!" ”

At this time, in front of Hong Dali was a huge carp more than a meter long, and Twilight looked back and smiled: "I said that there will definitely be big guys in here." Such a big carp must have fifty or sixty pounds, right? ”

"Definitely!" Hong Dali looked to the side again: "Look, there's also there!" It's all huge! It's going to take years, right? ”

He shouted over there, but Lin Chuyin suddenly said: "The water flow is in the right direction, the bottom of the cave has been spared, the terrain is upward, the water pressure is a little weaker than before, there should be something new in front of you." ”

Although the water looks ordinary, the deeper it goes, the more amazing the water pressure becomes, and the shallower the place, the weaker the water pressure.

Lin Chuyin's body sensing is as accurate as a machine, and she is absolutely right when she says so.

The three of them immediately increased the speed of the block and walked all the way forward, and suddenly the water pressure above the front dropped sharply, Hong Dali was overjoyed, and was about to continue to float, when suddenly there was a "bang", and his head hit a big stone.

"Ahh Hong Dali really shouted.

"This is ......" Twilight looked back but stretched out her hand to slowly touch the stone, and not long after, suddenly touched a small hole, the water of this underground pool has not dried up for so many years, it turned out that the water is seeping through this small hole little by little.

"It's this big rock that is blocking the water source!" Twilight looked back and shouted, "As long as we get this big rock away, the big turtle will probably be released!" ”

"Really?!" Hong Dali was pleasantly surprised: "Blow up this big stone? ”

"Well, not yet." Lin Chuyin thought for a while and said, "If the stone is blown up, the water will be very strong, we must get out of the water first, otherwise we will be washed to death by the current." ”

Once the stone is blown up, the underground lake on the other side will be under pressure, and there will inevitably be an extremely strong current of water rushing over, and if you bring some more stones or something, you will have to kill a few people - the most important thing is that there is no explosive......

"Go back first, I'll ask someone to bring compressed air bottles and underwater explosives!" Now that there is a solution, there is naturally no need to hesitate, Twilight looked back and smiled: "Sure enough, it's good luck to mess with Young Master Vigor." ”

Can it be bad? When he came back from Hong's Manor, he bought two scratch tickets and won more than 200 yuan......

Returning from the original way underwater, as soon as he got ashore, Hong Dali ran to the side of the big snapping turtle and said excitedly: "Hahaha, big turtle, we can save you!" Hahaha! ”

"Ang-" The big snapping turtle seemed to understand Hong Dali's words and let out a cry of joy.

Immediately, Twilight looked back and began to contact the engineers outside, and soon, the compressed air cylinder and the underwater remote-controlled explosives were sent by a special person, which was a very delicate device, connected to a remote control line of about 200 meters. Just put the device under the boulder and clamp it, and then press the button, and with a "boom", the big stone blocking the water source can be blown to pieces.

"I'll go!" Twilight looked back at the underwater explosives and said, "I'll just go myself, and I'll blow it up when I get back." ”

"Good! Then I'll watch it for you, haha. ”

Twilight immediately dived again, this time with ease, but returned in about twenty minutes, and as soon as she got ashore, she smiled: "Okay, it's been installed, let's find a place to stay, otherwise it will explode and don't drown us all." ”

"Then let's all go out first," Hong Dali suggested: "When the big rock is blown up, let's come in again depending on the situation, don't be flooded here." ”

Saying that, Hong Dali patted the turtle shell again, and said with a smile: "Big turtle, the big water will flood for a while, but you have to turn over by yourself!" ”

"Ang-" The turtle let out a long howl again and agreed.

Hearing the big turtle's promise, Hong Dali immediately ran out with people, and said excitedly as he ran: "Then let's prepare, haha!" Big turtle, watch Brother Mighty save you! ”

After Hong Dali and the others withdrew along the same path, Hong Dali took a deep breath, and then pressed the button of the remote control bomb in his hand!

"Boom—"

There was a dull explosion from inside the mountain, and then in the footage of the flying device left in the cave, the small lake in the cave seemed to boil, and bubbles began to bubble in the middle of the lake.

"Big turtle, prepare, the water is coming soon!" Hong Dali looked at the screen of his laptop and said worriedly.

"Bang la-la-" The water of the underground lake on the other side poured in, under the huge water pressure, the impact force was so huge, there was a loud bang, from the center of the lake a column of water rose to the sky, straight on the carapace of the big snapping turtle, one inch, two inches, one foot, two feet, one zhang, two zhang!

The water here hits the carapace of the giant tortoise, and the lake water over there pours into the entire cave, and the lake water has grown more than a meter high and deep in the blink of an eye!

"Wow!" The power of nature is now in front of them, Hong Dali and the others were dumbfounded, and they opened their mouths to exclaim!

"Boom-" The buoyancy in the water together, the giant water column over there rushed, and the body of the big snapping turtle, which was not known for tens of thousands of catties, actually stood up slowly, and then "boomed" The mountain shook, and the huge body of the giant turtle really turned over! (To be continued......)