初染菌数
initial bacterium numbers
空气细菌污染调查
air bacteria contamination investigation
食品污染菌
food-polluting bacteria
food contamination bacteria
microorganisms causing food contamination
污染菌
Contaminated bacteria
Contaminant microorganism
Bacteria
污染菌总数
total number of contaminated bacteria
细菌污染量
Numbers of contaminated bacteria
细菌污染率
bacterial contamination rate