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Kev tsis
Flocked swabs cim qhov kev hloov pauv tshiab tshaj plaws ntawm kev siv cov khoom siv ib zaug siv. Flocking yog hais txog cov txheej txheem ntawm kev thov (ntau qhov ntev fibers) - hu ua flocking - mus rau ib qho nplaum-coated nto los muab kev txhim kho cov qauv sau.Lub qhov ncauj lossis qhov ntswg pharyngeal swabs yog tsim los sau cov qauv kuaj hauv tsev kho mob rau kev kuaj mob hauv tsev kho mob. Qee lub chaw kuaj mob pom zoothauj lub swab nrog rau nruab nrab. Covyas ncej uas tau yooj yim txiav tawm tom qab kuaj cov qauv thiab muab tso rau hauv lub thawv thauj khoomrau khaws cia. Cov khoom siv los ntawm pab pawg swabs yog dispersed rau hauv cov kua nruab nrab.
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