哪个大虾知道在哪里可以免费下到这几个标准:
1)NFPA/T3.5.24 Hydraulic Fluid Power. Pressure Relief Valves. Method of Testing and Presenting Basic Performance Data;
2)NFPA T3.5.16-1988(R2008) Hydraulic fluid power. Flow control valves. Method for measuring and reporting regulating characteristics First Edition;
3) NFPA(Fluid)-T2.12.11-2-2007
4)ISO/TR 19972-1;
5)NFPA/T2.12.11-2-2007