英文關鍵字
background
bar
bars
bend
bender
bending
builder
building
cable
casing
closeup
concrete
construction
copper
detail
equipment
fitting
gloves
industrial
industry
iron
laborer
machine
machinery
man
metal
pattern
person
pole
professional
rebar
reinforcement
reinforcing
rod
roll
site
sleeve
steel
stirrups
strong
tool
tube
white
work
worker
workers