... with the features reliable, fast switch, noiseless, long life, compact, no spark, orrosion resistant and etc. Single phase ... with the features of reliable, fast switch, noiseless, long life, compact, no spark, corrosion resistant, explosion-proof, antivibration and so ... other fields where need the explosion-proof, anti-temperature, corrosion resistant. It becomes the ideal replacements of relay (EMR) ...