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API Spec 7-2 Addendum 1:2010

Заменен
Addendum 1 to Specification for Threading and Gauging of Rotary Shouldered Thread Connections, First Edition (previously covered in Spec 7) — 46 стр.
API Spec 7-2 Addendum 1:2010
Заменен
API Spec 7-2:2017
Действует