Whatman 滤膜 2602-500A 特殊测试纸,卷状,碘化钾,7mm*50mm/1

Whatman 滤膜 2602-500A 特殊测试纸,卷状,碘化钾,7mm*50mm/1 POTASSIUM IODIDE 7MMx5M 1/RL