Translate the given Spanish text to English
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Question: There is at least one perforation line (6, 6') within the web (5).

Answer: Dentro del nervio (5) existe al menos una línea de perforación (6, 6').


Question: In accordance with some embodiments of the present disclosure, a drilling system comprises a rotating control device (RCD).

Answer: De acuerdo con algunas modalidades de la presente descripción, un sistema de perforación comprende un dispositivo de control giratorio (RCD).


Question: The iron source comprises a fayalite-containing material.

Answer:
La fuente de hierro comprende un material que contiene fayalita.