英文關鍵字
airdrie
big
blades
blue
bolt
business
cable
calgary
chemical
chemistry
commercial
connection
construction
cylinder
elbow
energy
engineer
equipment
factory
field
flange
fuel
gas
hanging
huge
industrial
industry
inside
iron
line
machine
manufacturing
metal
part
pipe
piping
plant
plumbing
preparation
rivet
round
stainless
steel
support
technology
tube
valve
waste
work