地面和废水污染标准溶液4, Ground & Waste Water Pollution Standard Solution 4

氯化钠晶体光学盘, Sodium chloride crystal optic disc

氟化钡晶体光学盘, Barium fluoride crystal optic disc

氟化钙晶体光学盘, Calcium fluoride crystal optic disc

溴化钾晶体光学盘, Potassium bromide crystal optic disc

氯化银晶体光学片, Silver chloride crystal optic disc

氯化钠晶体光学盘, Sodium chloride crystal optic disc

溴化钾晶体光学长方体块, Potassium bromide crystal optic rectangle

驼绒毛刷(3/pkg), Camel Hair Brushes (3/pkg)

玛瑙研钵和棒, Agate Mortar and Pestle