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Naddik [55]
3 years ago
9

How often can someone breath fiberglass and glass dust before it becomes very harmful to the lungs? For how long?

Health
2 answers:
daser333 [38]3 years ago
6 0
For 30 minutes tops! Hope this helps jujubee

fenix001 [56]3 years ago
3 0
For 30 min. bye!!!!!!!
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