英文關鍵字
anchor
assembly
attached
blue
cable
chain
close
closeup
connection
crane
day
design
drop
engineering
fieldwork
fixation
flexibility
flexible
gray
heavy
holder
hook
industrial
iron
isolated
line
link
lock
macro
mechanism
metal
network
nut
power
reliable
roll
rope
rusty
security
sling
softfocus
stabilization
steel
strength
strong
structure
supply
tension
twine