SPDS. Standard identification codes and symbols for elements of plumbing systems
СПДС. Условные обозначения элементов санитарно - технических систем. |
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GOST 17.1.3.13-86Environmental protection. Water. General … |
GGTN 10-574-03-1Approval of rules for the installation and safe … |
RD 03-615-03On Approval of the Procedure for Using Welding … |