CJ20-400 220V 3常开3常闭 CJ20-400 220V 4常闭2常开 CJ20-400 36V CJ20-400 380V CJ20-400 380V 3常开3常闭 CJ20-400 380V 4常闭2常开 CJ20-400 400V CJ20-400 440V CJ20-400 660V CJ20-44