... is the company's long-term research and practice, independent research and development of new foaming agent, by the ... , coal slurry concentration, apparent, flotation technology and manual operation and other factors will change.INDEXSPECIFICATIONSAPPEARANCEdark brown or black ... be at room temperature, dry, ventilated warehouse storage and transportation. Shipment to light moving, gently, to avoid ...