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Правил аттестации сварщиков и специалистов сварочного производства
stresses
weld.
Regulations on welder and welding production staffers certification
(
Lidia P.
)
Правила аттестации сварщиков и специалистов сварочного производства
O&G
Qualification Rules for welding specialists and welders
(
Bemer
)
oil.proc.
Rules for qualification test of welders and welding production specialists
(Правила безопасности РТН
Stefan S
)
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