機器
agriculture
animal
automatic
bacteria
breed
business
cattle
clean
cleaning
closeup
cow
dairy
detail
disinfectant
disinfection
efficient
equipment
farm
farmer
farming
feed
food
herd
holstein
hose
hygiene
indoors
industrial
industry
legs
line
maintenance
mammal
milk
milking
pacifier
pipe
precaution
preparation
prevention
process
processing
production
rural
salmonellosis
sterilization
sterilized
system
udder