WHAT IS BITUMEN VG 30?
What is bitumen VG 30 type this is a type of viscosity bitumen that is produced in the refinery by blowing hot air into the vacuum bottom in the distillation tower, and according to the [...]
What is bitumen VG 30 type this is a type of viscosity bitumen that is produced in the refinery by blowing hot air into the vacuum bottom in the distillation tower, and according to the [...]