英文關鍵字
booster
busy
celsius
checking
compressor
control
crouched
electrician
electronic
engineer
examination
expert
factory
fahrenheit
gun
hardhat
heating
helmet
highpressure
industrial
industry
inspect
inspection
instruments
job
laser
looking
machine
machinery
machines
maintenance
measure
measuring
metal
overalls
overheat
overheating
preventive
protective
repair
service
station
supervisor
technician
technology
temperature
thermometer
worker