13 Add adequate PF-THIN to reduce the viscosity and gels of the mud.
13 Add adequate PF-THIN to reduce the viscosity and gels of the mud.
加入适量的PF－THIN，以降低泥浆的粘度和切力。
13 Add adequate PF-THIN to reduce the viscosity and gels of the mud.
加入适量的PF－THIN，以降低泥浆的粘度和切力。