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PDF Standards BS 1474:1987

Specification for wrought aluminium and aluminium alloys for general engineering purposes: bars, extruded round tubes and sections
standard by BSI Group, 12/23/1987

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BS

PDF Standards BS 142-3-3.1:1990

Electrical protection relays. Requirements for single input energizing quantity relays-Specification for single input energizing quantity measuring relays with non-specified time or independent specified time
standard by BSI Group, 12/31/1990

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