英文關鍵字
adjustable
adult
and
angry
autumn
cell
clothing
day
employees
engineer
foreman
gear
grass
guy
hard
helmet
iron
maintenance
male
man
near
occupation
outdoors
people
performing
person
phone
professional
protection
rail
railroad
railway
safety
sky
tablet
talking
talks
tape
the
track
transport
warning
with
worker
workers
working
wrench