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並前往https://www.cdc.gov/niosh/nmam/pdf/5528.pdf

NMAM 5528: Polynuclear aromatic hydrocarbons in air by GC ...

glass fiber filter (GFF) and a polytetrafluoroethylene (PTFE) retaining ring. The front section is separated from the back section of 100-mg XAD-7 sorbent with.

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