"However, there are some poisonous gases, and the filter tank cannot completely adsorb and filter, which will still cause harm to the human body!"

"I'm afraid, the sweet gas in the air can't be defended by gas masks!"

Xiao Li comforted: "Professor Lin, the gas masks we wear are relatively good, and there should be no major problems." ”

That being said, Xiao Li's own confidence is not very strong.

After all, gas masks were not particularly effective before.

"Crazy, do you still say that you are not a heavenly master? Chapter 150: The Ancient Light Bulb? I am hitting it in my hand, please wait a moment,

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