硼砂球の英語

透明なガラスを基材とするスピーカー振動板であって、ガラスが、少なくとも珪砂、硼砂、硼酸、アルミナ、および、食塩を原料とする耐熱ガラスであり、凹面とその反対側の凸面とを含む略球殻状の透明振動板部を備える。例文帳に追加

In the speaker diaphragm using transparent glass as a base material, the glass is heat-resistant glass containing at least silica sand, borax, boric acid, alumina, and salt as materials and the speaker diaphragm comprises an approximately spherical shell-shaped transparent diaphragm part including a recessed surface and a projected surface arranged on the opposite side of the recessed surface. - 特許庁