英文關鍵字
hazardous
machine
storage
tank
clothing
protective
vessel
pressure
industrial
nitrogen
compressed
laboratory
scientist
chemical
factory
uniform
tap
knob
handle
plant
pharmaceutical
man
male
equipment
spin
moving
interior
inside
view
lab
fingers
closeup
control
gloves
hand
holding
indoor
industry
opening
person
research
rubber
science
technician
turning
valve
worker