不倒翁有两种, 一种为水钙铝榴石玉, 另一种为玉髓蛋白石玉.Budaoweng has two kinds, one is hydrogrossular, the other is chalcedony opal.一种略微透明的绿色玉髓,用作宝石.A light green or light grayish - green variety of translucent chalcedony.最近我们鉴定到一些新的模仿品,其折射率及比重非...
方法是用浸透丙酮的布块在涂层上面擦拭, 若固化不良,涂层会被溶解.Acetone is impregnated fabric coating, above, to curing coatings will be dissolved.或者用含丙酮的网垫擦洗光学表面.Scrub each optical surface with a gauze pad soaked in acetone.钢瓶内填充着充满了浸透了溶剂, 通常是丙酮的多孔渗水...