英文關鍵字
adult
background
bridge
cell
checking
clothing
control
day
documentation
engineer
engineering
foreman
gear
guy
hard
hat
helmet
industrial
industry
jacket
job
male
man
men
objects
occupation
one
outdoors
phone
plant
power
profession
professional
protection
reading
safety
sluice
station
supports
talking
the
under
vest
winter
with
worker
writing