Regarding its generation source bitumen can be classified intothree categories: natural, petroleum asphalts, coal tar pitches: A- Natural bitumens or native asphalts are a class of bitumenswhich have been naturally produced due to climate ...

We would like to take this opportunity introduce Nakhle Baharestan Pardis Co (NBP) as the major, Iranian company dealing with oil, gas and petrochemical products. NBP Co, groups so many products which is related Iran's Oil. I want inform you, that we ...