機器
air
background
bend
beside
blue
bolts
circle
complex
connection
construction
control
crease
detail
diameters
dirty
drain
elevated
energy
engineering
equipment
factory
faucet
flanges
flow
fluid
fossil
fuel
gage
galvanized
gas
gasoline
gate
generation
hydraulic
industrial
industry
iron
isolated
joint
junction
leak
lines
lock
manifold
mechanical
metal
meter
natural
nuts
object
oil
old
open
orange
paint
panels
perpendicular
pipe
pipeline
pipes
power
pressure
proof
pump
raised
red
rivets
roof
screw
side
specifications
square
steel
supply
system
tank
technology
transportation
tube
valve
valves
water
wheel
white