Russian standards PDF
GOST 19623-90
Unidirectional restrictor valves of flying vehicles air systems. Types and general technical requirements
Document status: Active
€10
GOST 19703-79
Wire of lead brass of grade LS 63-3. Specifications
Document status: Active
€10
GOST 19746-74
Wire from silver solders. Specifications
Document status: Replaced by GOST 19746-2015
€10