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

Al-23坩埚, Al-23 Crucible

Al-23坩埚, Al-23 Crucible