Blue-gray stone slabs dotted with vertical and horizontal cracks. Pen, fun, and www.biquge.info

Just now, the dripping arrows were fired at the same time because of their movement, and the danger was everywhere. Unexpectedly, this turned out to be a turning point.

"How did you just judge? Every bluestone slab, the weight, position, and order of stepping on it are all influences. Squatting on the ground and taking a closer look, he still couldn't figure out the mystery and asked suspiciously. Obviously difficult to solve the problem, they all lived a flexible and relaxed life, pouting, and I was the only one who was completely confused.

"It's not that hard. Non-sub. The fat man pulled me in, and then boldly stepped on one of the stone slabs and twisted it arrogantly, "This thing is called a chain flip trap." Generally, many knife cone sharp tools are distributed under the pit, and then several wooden planks are flattened on the upper layer of the pit, and there is a shaft in the middle of the plank, and a small object of the same weight is decorated underneath, which is in the shape of a balance scale, and there is a cover on the board. ”

So if a man steps on a plank, one end of the board sinks, and he falls to the cone in the pit. It's called a flesh blur. Xian'er added, "You are lucky, you only stepped on the control board of the crossbow machine." This is a chain of organs, it is difficult to say, it is not difficult or difficult, as long as you observe it carefully. We are accustomed to this kind of trick, and it is not unusual to judge in an instant. ”

"How to link?"

"The shaft in the middle of the plank is like a pulley, and on one side of the pulley is a crossbow and a poisoned arrow, and the rope is connected to the crossbow through the pulley, and when the foot steps on it, the rope triggers several arrows from the bow and crossbow through the wheel to shoot the incoming person. Therefore, there will be a difference in the weight of the foot. "The place where the fat man's finger is is the gap between each plank, and if you look closely, those with a slightly lower thickness are fine, because they are used to hang gears, and they are relatively stable. Slightly higher, it's the trap.

"It's not shallow."

"Actually, there are rules. The ancients believed in the Zhou Yi astrological signs, and there were also considerations in this regard when arranging the organs, and they were familiar with the habitual ones, and it was not difficult to distinguish the others. The fat man was interested, and looked at the spitting smugness, and if I asked again, she was afraid that she would not be able to listen to it even more.

"Let's not talk about that, Xian'er, how did you open what you just found?"

Xian'er rolled up her sleeves and pulled out the short knife on the fat man's waist, she didn't feel embarrassed when she looked like that, I doubt if they knew each other before, it's rare to have such a tacit understanding.

"There are no signs of destruction here, except that the axle of one of the bluestone slabs is connected to the open mechanism. We don't know the exact direction, and the easiest way to do this is to cut all the connected ropes with a knife and then observe the direction of the gears to make a judgment. ”

The fat man interjected: "Are you so sure? You know, if the cut rope is the node of force, maybe our strength is not enough to open the door. ”

I understand what the fat man means. In some cases, the force generated by the mutual force of the gears can be doubled to lift heavy objects. For example, in a mechanics illustration in a high school physics textbook, if I want to pull up a fat man with my weight, I only need to tie her to a moving pulley, and add a fixed pulley to easily do it.

Fine work, naturally let fine people do it. All the way, all the way to the shear, flying up and down, like a puff of smoke drifting by, any mechanism and ingenuity are all wiped out...... Of course, just kidding, it's not that exaggerated, it's just that the technique is unusually skillful.

"You're lying to me, aren't you? You're actually a professional wool consumer, right? He looked at Xian'er suspiciously.

"......" someone was silent for a moment, "I'll go down and find the joint point......"

Xian'er lifted the stone slab that had no effect, and put it aside neatly, and made two stacks of them. Without the ropes that connect the many levels, the mechanism is no longer enough.

The ropes that had been cut were broken and laid out throughout the mechanism, like earthworms, twisting and stirring together, forming a hideous posture, which was annoying.

The axle was very corroded, and the beads that fluctuated in the middle were corroded like the surface of the moon. The arrangement of the axles is very complicated, and it feels like every rope jump will affect the axles that you don't understand.

Xian'er did not jump recklessly, but crouched on the edge of the trap pit, frowning and pondering, sketching the original connection structure in her mind.

For a quarter of an hour, his eyes flashed, and he noticed a smaller axle.

Its position is ordinary, in the middle of many axles, and it is strangely a head, and if you look closely, you can see that it is more than the others. Looking for them one by one along the approximate direction, sure enough, there are seven in total, the simplest Big Dipper pattern. But if you don't see the differences in the many axles, it's hard to see the tricks.

"I don't know who made the chamber. How can Tuyuhun's skilled craftsmen be so good at calculation? I want to get to know this people anew. "I sighed with emotion. The fat man nodded in agreement. The ethnic minorities in the north give people the impression of being bold and generous, and they really don't realize that their mechanism skills have been developed to this extent in the Tang Dynasty.

As a well-known star position, the Big Dipper has been used by the Chinese people in thousands of years. For example, the one in front of me seems simple. If you think a little deeper, you will find that when it is the beginning of the connection, it will be the center of all the ordinary axles here, and it will move the whole body in a myriad of ways. To put it simply, as a conclusion, connect directly to the mechanism we want to open.

Therefore, the simpler and more familiar it is, the more varied it is, and it is difficult to break through.

Pulling out the rope we had brought from our waist, untying it layer by layer, and then using his conjecture combined with the rope scattered on the ground, Xian'er began to wrap around the Seven Star Wheel Axis. Carefully staggering the touches of unrelated axles, the result was the closest to the original version of the Seven Stars.

He took a heavy breath and decisively pulled up the rope.

Three to five seconds later, with a creaking sound, Xian'er's excellent hearing came into play. The subtle sound distinguishes it from the axle and is accurately captured by him. He quickly grabbed the stone slab on one side and lifted it hard, and there was a violent shock all around, and heavy dust fell from the top of his head. At the same time, the stone slabs above my head were pulled apart to the sides, and I used my fastest speed to avoid being blinded by the dust, and at the same time pulled out my flashlight and fired upwards.

stared blankly at the mechanism that had been opened...... Just above our heads,

It was a deep well that didn't know where it led. In the dark hollow, an object like a hanging corpse described by the fairy floated above our heads.

The difference was that he was hung upside down, apparently seeing us stunned as well.

The pale and weak, severely dehydrated Zhen Tang Yan raised his head and grinned, "Hi! I'm here ......."