معنى الجمع بين زوجين في القاموس

Yarn used to clean between the teeth (dental floss)

Of other glass having a linear coefficient of expansion not exceeding 5 x 10 6 per Kelvin within a temperature range of 0 °C to 300 °C

Of other glass having a linear coefficient of expansion not exceeding 5 x 10 6 per Kelvin within a temperature range of 0 °C to 300 °C

Of glass having a linear coefficient of expansion not exceeding 5 x 10 6 per Kelvin within a temperature range of 0 °C to 300 °C

Without housing, having a frequency range of 300 Hz to 3.4 kHz with a diameter not exceeding 50 mm, for telecommunication use