機器
background
bolt
business
chemical
connection
construction
control
energy
engineering
equipment
factory
field
flange
gasoline
generation
heat
heating
industrial
industry
iron
line
manufacturing
metal
natural
oil
old
petroleum
pipe
pipeline
pipework
plant
plumbing
power
pressure
pump
regulator
repair
rust
rusty
steel
supply
system
technology
tube
valve
water
work