英文關鍵字
bend
bending
curved
engineer
engineering
fabricate
fabrication
factory
folding
hand
hydraulic
iron
machine
machinery
making
men
metal
metalwork
person
pipe
roll
roller
rollers
shaping
sheet
three
tube
tubing
with
work
worker
workshop
英文關鍵字
bend
bending
curved
engineer
engineering
fabricate
fabrication
factory
folding
hand
hydraulic
iron
machine
machinery
making
men
metal
metalwork
person
pipe
roll
roller
rollers
shaping
sheet
three
tube
tubing
with
work
worker
workshop