Example: confidence
Qualitative Fit
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ASBESTOS by TEM 7402 - Centers for Disease Control and ...
www.cdc.govThe top and bottom of the petri dish must fit snugly together. To assure a tight fit, grind the top and bottom pieces together with an abrasive such as carborundum to produce a ground-glass contact surface. 10. Foam, clean polyurethane, spongy, 12-mm thick. 11. Filters, Whatman No. 1 qualitative paper or equivalent, or lens paper. 12. Vacuum ...