燧石玻璃

wǒ men de zhě suān yán bō li de shēng guāng pǐn zhì yīn shù yōu yú zhòng suì shí bō li

我们的锗酸盐玻璃的声光品质因数优于重燧石玻璃。

The acousto-optical quality factor for our germanate glass is better than that of heavy flint glasses.