英文關鍵字
1080
1920x1080
diesel
for
fuel
gate
oil
people
pipe
pipeline
pipes
shale
silhouette
stopcock
valve
valved
valves
valvular
vent
ventil
video
with
without
英文關鍵字
1080
1920x1080
diesel
for
fuel
gate
oil
people
pipe
pipeline
pipes
shale
silhouette
stopcock
valve
valved
valves
valvular
vent
ventil
video
with
without