機器
anticorrosion
automation
bonded
coating
construction
corrosion
engine
engineering
equipment
external
extrude
extrusion
factory
flange
fusion
gas
heating
heavy
industrial
industry
layer
liquid
machinery
manufacture
manufacturing
mechanical
metalworking
multilayer
oil
pipe
pipeline
plant
polyethylene
polymer
polypropylene
polyurethane
power
pressure
production
protection
ring
spraying gun
steel
technology
tube
workshop