Are fire fighting signal valves and signal butterfly valves the same thing?
The same nature: both can open and close, there is also information back fed.Signal valves are collectively referred to as signal butterfly valves.
The same nature: both can open and close, there is also information back fed.Signal valves are collectively referred to as signal butterfly valves.
The same nature: both can open and close, there is also information back fed.Signal valves are collectively referred to as signal butterfly valves.
