Instructions for the design and installation of passages for conduits and electrical wiring for instruments and automation systems through walls and floors of buildings and structures
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VSN 012-88 Часть 2Construction of trunk pipelines and flowlines. … |
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GOST 8510-86Hot-rolled steel unequal-leg angles. Dimensions. |
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PUE PUE, 7, Section 5Pue_7_Section 5_Electric Power Units |