英文關鍵字
aluminium
business
circle
clamp
clamping
clamps
clasp
clip
close
connection
construction
device
duct
engineering
equipment
fastener
fasteners
fitting
fix
flexible
focus
gear
grip
hands
hardware
hose
industrial
industry
insert
installation
installing
installs
iron
material
metal
metallic
new
pipe
pipes
plumber
plumbing
pressure
pump
repair
ring
round
rubber
screw
selective
sewerage
shiny
steel
supply
systems
tool
tube
tubing
water
while
work