機器
abandoned
ancientness
antiquarian
antiquity
background
bush
cast iron
chain
closeup
control
dam
dams
detail
drive
engineering
factory
gateway
gear
gearing
gears
hydro
hydrodynamic
industry
iron
lock
mechanical
mechanics
mechanism
metal
mill
natural monuments
old
port
protection
remoteness
river
rust
rusty
scale
shaft
sluice
steel
stream
vintage
walking
water
wave machine
weathered
wheel