... table cutter 顶面琢磨者 thallium glass 铊玻璃 translucent 半透明,亚透明 ...
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thallium m glass 铊玻璃
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We sometimes dope this glass with other metal oxides to change the optical characteristics: thallium oxide is used in faceplates for deep sea divers and lanthanum oxide in camera lenses.
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