英文關鍵字
angleiron
armature
background
bar
building
bunch
bundle
capping
cast
china
commercial
concrete
container
corrosion
crane
docks
durable
engineering
equipment
factory
ferrous
fitting
fittings
fret
fusing
girder
goods
group
heavy
industrial
industry
iron
lines
manufacture
metal
metallurgy
mountings
net
pile
port
rail
reinforcement
rust
sky
stack
steel
technological
terminals
transport
transportation