He looked around and found that there was a power strip under the computer on his desk. He carried the ventilator to the computer desk, plugged in the ventilator, and heard the machine immediately beep.

.

Zhang Boi looked at the oxygen supply box. There was a small screen and a few buttons on it. The screen was now on. There were several numbers written on it, which were probably values ​​such as temperature, humidity, and air pressure. Zhang Boi thought, what?

How can I make this thing vent its anger? Is it possible to vent its anger just by taking it with me?

He tried pressing a few buttons, but there was no response. At this time, he discovered that there was a rather large knob next to these buttons. What was it for?

Zhang Baoyou tried to twist it, and suddenly, the ventilator made a gentle "buzz" sound, and then started to work.

Done! Zhang Baoan thought to himself. He picked up the end of the mask and gently covered it on his palm. He immediately felt a gentle airflow blowing out.

Huh? It seems that the ventilator should be fine, which means that the old beggar did not suffocate due to the ventilator.

Zhang Baojun sat down on the ground, looking a little frustrated. He tried all the clues he could think of, but in the end he still found nothing. A deep sense of frustration came over him in vain. He even felt that he was so persistent in trying to figure it out.

You know this is a stupid act.

After feeling sorry for himself for a while, Zhang Badou stood up again and tried to turn off the breathing machine and put it back on. However, he might have gotten up too hard and the blood supply to his brain was insufficient. He stumbled and almost fell down. His hand accidentally touched the oxygen supply connector.

The air pipe on the device box suddenly made Zhang feel that the mask in his hand seemed to have no air flow!

At first he thought the gas pipe had been knocked off, but when he looked carefully, he saw that the gas pipe was still well connected to the oxygen supply box. What was going on?

Zhang Badai quickly checked the tube carefully. There was no problem with the tube from the mask to the connection part of the Y-shaped tube. There was also no problem with the exhalation tube end of the Y-shaped tube. However, when inhaling

At this end of the pipe, Zhang Baoli discovered that there was a crack about one centimeter long near the root of the pipe!

At first glance, this crack was made artificially. Because it is too close to the root, the hardness of the pipe makes the crack completely closed at ordinary times. Therefore, there is almost no air leakage under normal use. However, due to poor tension, I pulled hard just now.

The crack is forced to open, so the gas immediately leaks from the crack, so that there is almost no gas output from that end of the mask.

It turned out to be like this! There was a burst of ecstasy in Zhang Baoan's heart, and finally he discovered the clue. Now it can basically be concluded that the problem lies with this machine. As long as one more thing is proved, the old man can basically be found out.

The cause of the beggar’s death is to confirm that this ventilator is the one the old beggar used before!

How to prove this? Zhang Baolan's brain was working at a rapid speed. It has been less than 24 hours since the old beggar died in the middle of the night yesterday. Generally used ventilators must be disinfected, and masks and even air tubes that come into contact with patients must be disinfected.

They must all need to be replaced, and this ventilator is placed in the corner like this. Obviously, it has not had time to perform these operations. The cracks on the tube also prove this. This is the most powerful evidence! So,

As long as data such as the old beggar's fingerprints or DNA can be extracted from the mask, it can be proved that the user of this ventilator is the old beggar!

Zhang Liang felt that his thinking was extremely clear now, and he made a decisive decision. No matter what, the tube and mask must be taken away!

So he got up and wanted to turn off the ventilator, and then find a way to remove the tube. But after searching for a long time, he couldn't find the switch. Finally, he was cruel and unplugged the power strip.

Come down.
Chapter completed!