PREVIEW
... lanations,
they gradually understood.
It was indeed different from before.
Previously, the focus was on manufacturing filters and then placing them in a polluted environment; this was a method of dealing with polluted gases after their generation. This time, however, it involved a universal product additive that could be incorporated into various raw materials.
Such as formaldehyde.
In the past,
indoor filters were used to filter out formaldehyde i ...
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