英文關鍵字
assembly
attached
automotive
blue
cable
chain
close
closeup
connection
crane
design
device
engineering
equipment
flexibility
flexible
hardware
heavy
hook
industrial
industry
iron
link
lock
machine
macro
metal
power
roll
rope
rusty
screw
security
sling
softfocus
stabilization
steel
stowage
strength
strong
structure
supply
technics
technology
tension
towrope
twine
white
wire