2[3]ISO 4406-1987,Hydraulic Fluid Power-Fluids-Method for Coding the Level of Contamination by Solid Particles[S].
3[4]ISO 4402,Hydraulic Fluid Power-Calibration of Automatic-count Instruments for Particles Suspended in LiquidsMethod Using Classified AC Fine Test Dust Contaminant[S].
4[5]ISO 4406-1999,Hydraulic Fluid Power-Fluids-Method for Coding the Level of Contamination by Solid Particles[S].
5[6]ISO 11171,Hydraulic Fluid Power-Calibration of Automatic Particle Counters for Liquids[S].
6[7]NAS 1638,Cleanliness Requirement of Hydraulic Fluid System[S].
7[8]GJB 420,飞机液压系统用油固体污染度分级[S].
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