73067210
Oct 28, 1975
Feb 1, 1977
CONSTRUCTION OF CHEMICAL PLANTS IN THE FIELD OF THE CATALYTIC UPGRADING OF TAR OILS
Building Construction and RepairPROVIDING CONSULTING, PLANNING AND CHEMICAL ENGINEERING SERVICES TO THE CHEMICAL INDUSTRY AND THE DESIGNING OF CHEMICAL PLANTS IN THE FIELD OF THE CATALYTIC UPGRADING OF TAR OILS
Computer and Scientific