Whatman 滤膜 2600-204A 酸碱测试纸, 卷式, 酚酞, 7mm x 5m 1/盒

Whatman 滤膜 2600-204A 酸碱测试纸, 卷式, 酚酞, 7mm x 5m 1/盒 PHENOLPHALEIN 7MMX5M 1/RL