b.Nguyen liquids taken in the following order: Take the following order
- of liquid colorless, odorless, non-stick
- material slightly colored liquid, somewhat smelly, non-stick
principle for liquid, colored , heavy and sticky
c. for pastes: taken in the following order
- pastes, semisolid, white
- pastes, difficult to distinguish colors
- pastes, with dark
d. materials required microbiological examination
- Taken before and stored in sterile bottles
- performed the sampling in LAF
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