HG/T 20686-1990Unified regulations on images and verbal symbols in electrical design for enterprises in chemical industry (English PDF)

HG/T 20686-1990 is the English-translated version of 化工企业电力设计图形和文字符号统一规定.

HG/T 20686-1990 is the Chinese industry standard "Unified regulations on images and verbal symbols in electrical design for enterprises in chemical industry". It is obsolete: it has been replaced by HG/T 20686-2024.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

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