Last Updated:2025/11/22

The antique telephone mouthpiece was made of vulcanite, its surface smooth despite decades of use.

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The antique telephone mouthpiece was made of vulcanite, its surface smooth despite decades of use.

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そのアンティークの電話のマウスピースは硬質加硫ゴムでできており、何十年の使用にもかかわらず表面は滑らかだった。

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