NF T51-560-1990 塑料.熔融状态下流变特性的测定.毛细管流变仪法 (PLASTICS. DETERMINATION OF THE RHEOLOGICAL CHARACTERISTICS IN THE MOLTEN STATE. CAPILLARU RHEOMETER METHOD.) NF T51-620-1971 塑料.聚丙烯和复合聚丙烯热流动指数的测定 (DETERMINATION OF THE MELT FLOW INDEX OF POLYPROPYLENE AND POLYPROPYLEN...