International Organization for Standardization (ISO)
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ISO 4391:1983
Scope
Describes and systematically defines the principal technical characteristics, and allots letter symbols to these characteristics, and indicates how they can be more clearly defined by suffixes corresponding to particulate cases. Lists also an analysis of parameter dimensions. Gives examples for the use of symbols with suffix, and includes definition of terms without symbols.
ISO 4391:1983 history
1983ISO 4391:1983 Hydraulic fluid power; Pumps, motors and integral transmissions; Parameter definitions and letter symbols
1982ISO 4391:1982 Title missing - Legacy paper document