英文關鍵字
aluminium
bench
build
cut
danger
design
drill
energy
engineer
heat
holes
make
manufacture
method
power
rotate
safe
safety
sheet
speed
swarf
英文關鍵字
aluminium
bench
build
cut
danger
design
drill
energy
engineer
heat
holes
make
manufacture
method
power
rotate
safe
safety
sheet
speed
swarf