機器
analysis
analyzing
business
chemical
control
crude
crude oil
energy
engineer
equipment
exam
exploration
extraction
factory
fingers
flask
gas
goggles
helmet
industrial
inspector
jack
lab
leadership
manufacturing
measurement
mechanical
occupational
oil
operator
people
petrochemical
petroleum
power
professional
protective
pump
record
research
rig
science
service
skill
sunset
supervisor
test
trainee
tube
uniform