Hebei Pengfa Tshuaj yog ib lub tuam txhab koom nrog hauv kev tsim, muag thiab xa tawm ntawm glacial acetic acid, acetic acid tov, formic acid, phosphoric acid, dyeing acid, sodium aceta, calcium formate, sodium formate, composite carbon qhov chaw, bioactive carbon qhov chaw. ..
Nyeem ntxiv