State system for ensuring the uniformity of measurements. National standard. Standard reference data. Tellurian glasses of system TeO2 + R2O and their fusions. Thermal conductivity in the temperatures range from 300 K to 800 К and concentration of oxides of alkaline R2O
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Part 5. Resistance to earth