| SPDS. Standard graphic symbols for geotechnical survey documents
СПДС. Условные графические обозначения в документации по инженерно-геологическим изысканиям |
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GOST 17.1.1.04-80Environmental protection. Water. Classification … |
GOST 26428-85Soil. Methods for determining calcium and … |
GOST 17.1.5.02-80Environmental protection. Water. Health … |