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IPC 2228
ASHRAE 170-2017 Addenda a
ASTM B927/B927M-17
ITU-T G.870/Y.1352
ITU-T L Supplement 32
ITU-T X.1038
ITU-T Y.3301
AWS D20.1/D20.1M:2019
IEC 60050-444 Ed. 1.0 b:2002
AWS C3.9/C3.9M:2020
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