CSN 72 6023 Za-1978 Revision a) 11-12/1978 Czech National Standard 72 6023 Measurement of insulation resistance of refractory articles at higher temperatures
1978CSN 72 6023 Za-1978 Revision a) 11-12/1978 Czech National Standard 72 6023 Measurement of insulation resistance of refractory articles at higher temperatures