宝石折射仪 gem refractometer

熊石折戸町 Kumaishi Oritocho

超高压岩石折返 exhumation of UHP rocks

重曲折晶石 double refracting spar

石油产品折射率测定仪 Automatic Digital Refractometer

石棉布折叠形垫片 [纺] asbestos-cloth folded gasket

单折射宝石 singly refractive stone

双折射宝石 doubly refractive stone ; birefringent gemstone

钻石棱镜折射仪 diamond refractometer

尖晶石棱镜折射仪 spinel refractometer