Whatman 滤膜 2602-501A 特殊测试纸,卷状,醋酸铅,7mm*50mm/1

Whatman 滤膜 2602-501A 特殊测试纸,卷状,醋酸铅,7mm*50mm/1 IND LEAD ACETATE 7 MM x 5 M 1/RL