英文關鍵字
accuracy
accurate
business
caliper
construction
control
device
diameter
education
electronic
engineer
engineering
equipment
factory
hand
handyman
industrial
industry
inspection
instrument
laborer
lathe
machine
manufacturing
measure
measurement
mechanic
mechanical
metal
metallic
millimeter
milling
object
people
person
precision
professional
quality
safety
scale
steel
technician
technology
tool
vernier
work
worker
workman
workplace
workshop