Flanged and butt-welding end steel plug valves for the petroleum industry (excluding well-head and flow-line valves)
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Specification for testing of positive displacement compressors and exhausters-Methods for acceptance testing
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Specification for testing of positive displacement compressors and exhausters-Methods for simplified acceptance testing for air compressors and exhausters
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Marking and arrangement of switchboard busbars and connections (including arrangement thereof for three-phase systems)
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Marking and arrangement of switchgear busbars, main connections and small wiring
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