Langfang BLD Trade Co. is a professional company, which distributes chemicals manufactured by our own factory -- Langfang Greatap Chemicals Co., Ltd., and other commodities or services from our cooperators. Advantages: Water treatment chemicals - Polyquats, Biocide-algaecide, Polymaleic acid Intermediates - Metal Hydride, Borohydride, Raw material for Pharmacy and Dyestuff Auxiliary Agent and Catalysts - Coating Additive Technology Transfer Water Treatment Equipment Portable ...