What does "Y" mean? What does "Z" mean?
Y- stands for the pressure gauge, and Z- stands for the vacuum meter.
Y- stands for the pressure gauge, and Z- stands for the vacuum meter.
In the instrument type representation: Y said Z said pressure, vacuum or damping, J precision or rectangular, A ammonia table, X signal or electric contact, XC said magnet electric point, said P E said the diaphragm membrane box, F corrosion, N said seismic, T said the spring tube, B said stainless steel and so on.
