英文關鍵字
connection
connector
construction
control
device
engineering
equipment
fitting
fittings
flexible
hands
hose
hydraulic
hydraulics
industrial
industry
installation
machinery
maintenance
mechanic
metal
metallic
oil
pipe
pipeline
pipes
plumber
plumbing
power
powerful
pressure
pump
repair
segment
service
set
stainless
steel
system
technology
tool
tractor
tube
tubing
union
valve