Tubes of other glass having a linear coefficient of expansion not exceeding 5 × 10–6 per Kelvin within a temperature range of 0 °C to 300 °C
Steklo v obliki cevi, iz drugega stekla, ki ima linearni dilatacijski koeficient do 5*10 (-6) po Kelvinu pri temperaturi med 0°C in 300°C