英文關鍵字
equipment
plastic
pipeline
pipe
line
water
tube
construction
black
technology
industry
engineering
industrial
work
welding
power
plumber
plant
automatic
safe
service
modern
shiny
together
tool
welder
production
material
steel
machine
glue
fast
connection
hose
machinery
business
job
blue
heat
handle
background
help
device
connect
control
inside
electric
lock
design
hot