英文關鍵字
angle
armature
billets
business
carving
chalybeate
cleans
details
disk
drilling
engineering
fabrication
ferrous
ferruginous
fittings
glandular
gloves
grinder
grinding
gyre
hazardous
industry
iron
labor
lathe
machine
make
manufacture
mask
metal
metallurgical
metallurgy
milling
past
pipes
pitting
polishing
production
protection
reinforcement
rust
rusty
salvaging
spark
steel
steely
technology
tubing
turner
turning