英文關鍵字
assembly
billet
blank
block
checking
closeup
connector
control
defect
detail
engineering
equipment
facility
factory
hand
holding
hole
industrial
industry
inspection
iron
manufacture
manufacturing
material
mechanical
metal
metallic
metalworking
modern
part
plant
process
product
production
quality
sample
stainless
steel
thread
unit
using
visual
work
worker
workshop