Pneumatic valve figure number and said method

（ A)
industrial pneumatic valve figure number and representations of commonly used controls on the pipeline and equipment mainly refers to some commonly used pneumatic valve, which is used to control the pipe flow of the medium.
pneumatic valves have brakes used pneumatic valve, pneumatic valve, globe throttling pneumatic valves, pneumatic ball valve, butterfly valve, pneumatic diaphragm valve, cock pneumatic pneumatic valve, safety valve, check valve, pneumatic valve, plunger vacuum pneumatic valve and hydrophobic pneumatic valve.
　 （ 2) The characteristics of the structure, all kinds of pneumatic valves and choose
there are many kinds of pneumatic valves, but according to its motion characteristics are divided into two categories, namely drive pneumatic valve and automatic pneumatic valves.
is driven by pneumatic valve by hand control or other power control of pneumatic valve.