Hydraulic fluid power—Fluid contamination—Determination of particulate contamination by the gravimetric method
MOD ISO 4405:1991
全国液压气动标准化技术委员会(SAC/TC 3)
本标准规定了测定液压系统工作介质颗粒污染度的两种称重法（双滤膜法和单滤膜法）。双滤膜法可得到更精确的检测结果。
本标准适用于检测颗粒污染度大于0.2 mg/L的液压系统工作介质。
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