The carrier of the modified filter medium is the volcanic rock coated with a polycondensate modifier.
改性滤料的载体为火山岩,火山岩上涂有缩聚物改性剂.
互联网
The colloidal particle is the polycondensate of hydrated silica gel acid, belongs to a non - crystalline - state substance.
是具有固体特性的胶态体系,由形成凝集结构的胶体粒子构成.
互联网