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

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

氯化钠晶体光学长方体块, Sodium chloride crystal optic rectangle

玛瑙研钵和棒, Agate Mortar and Pestle

标准样品管, Standard Sample Tube

USA标准分子筛, USA Standard Sieve

美国标准分子筛, USA Standard Sieve

Al-24管(一端封口);外径 (mm), Al-24 Tube (one end closed);OD (mm)

Al-23 Tube

Al-23实心棒, Al-23 Solid Rod