PH Ntawv
100 ib daim hlab nyias nyias rau hauv ib lub thawv yas nrog pH xim kab kos, Ntawv Ntsev Univeral kuaj ntawv ph1-14, 100 strips / thawv
Sau koj cov lus ntawm no thiab xa rau peb
100 ib daim hlab nyias nyias rau hauv ib lub thawv yas nrog pH xim kab kos, Ntawv Ntsev Univeral kuaj ntawv ph1-14, 100 strips / thawv