Environmental protection. Soil. Requirement for fertile layer conservation in performing earth works
Охрана природы. Почвы. Требования к охране плодородного слоя почвы при производстве земляных работ. |
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GTN 09-170-97General Regulations of Explosion Safety for … |
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Gosnadzor 4ON THE APPROVAL AND IMPLEMENTATION OF FEDERAL … |
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GOST 19281-89Rolled steel with increased strength. General … |