API SPEC 7-1:2006 (R2015)

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Specification for Rotary Drill Stem Elements, First Edition - Identical to ISO 10424-1:2004, Includes Addendum 1 (2007), Addendum 2 (2009), Addendum 3 (2011) — 87 стр.

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API Spec 7-1 (R2015) Addendum 4:2019

Заменен

Addendum to Specification for Rotary Drill Stem Elements, First Edition -- Identical to ISO 10424-1:2004 — 4 стр.