Narrower Terms (22)

• ▶ Air valves
• Airplanes--Motors--Valves
• Ball valves
• Butterfly valves
• Compressors--Valves
• Diesel motor--Valves
• Electric power-plants--Piping--Valves
• ▶ Expansion valves
• ▶ Internal combustion engines--Valves
• Liquid propellant rockets--Fuel systems--Valves
• Natural gas pipelines--Valves
• Nuclear power plants--Piping--Valves
• Petroleum pipelines--Valves
• Pneumatic control valves
• Pressure vessels--Valves
• Proportional valves
• Radiators--Valves
• Relief valves
• Slide-valves
• Space vehicles--Control rockets--Valves
• Tanks--Valves
• Water-pipes--Valves