petrochemical industry造句
31 Specification for welding of Cr - Ni austenitic steel, Fe - and Ni alloy pipe for petrochemical industry.
32 This paper introduces one test method of VOC in refinery units with the practice of petrochemical industry. And, rough calculation on quantity of VOC leak in unit is made according to EPA method.
33 Petrochemical industry ready to adjust text of the revitalization planning.
12