ʻO ka Sliding Ruler No ka Mikroscope Biological

A54.1504 Pālua Hoʻoneʻe Nūhou, Nānā Nūhou 30 * 60mm, Screw i ka Line Line ma ke ʻano he kiʻi A54.1504-1 Double Double Horizontal Moving Knob, Moving Range 30 * 60mm, Screw i ka Triangle Postion ma ke ʻano he kiʻi