英文關鍵字
activity
angle
background
bench
boilersuit
bright
building
color
construction
cutting
detail
details
exposure
factory
grind
grinder
grinding
hand
hands
hard
heat
hedge
indoors
industry
locksmith
making
man
manual
manufacturing
mechanic
metal
metalworker
motion
overalls
palisade
people
person
polishing
power
safety
sampling
steel
structure
tool
work
worker
working
workshop
yellow