英文關鍵字
accuracy
asian
background
blue
build
caliper
calliper
closeup
constructing
dimensional
distance
engineering
equipment
female
gauge
high
inch
industrial
industry
instrument
lab
machine
male
measure
measurement
metal
metallic
meter
metric
micrometer
millimeter
nobody
numbers
object
person
precise
precision
rule
ruler
sample
scale
stainless
steel
technology
thickness
tool
trammel
vernier
woman
work