Weitere Beispiele werden automatisch zu den Stichwörtern zugeordnet - wir garantieren ihre Korrektheit nicht.
The wrench is introduced inside the pipe (especially a close nipple, which has threading its entire length, and therefore no surface for an outside wrench).
A "close nipple" has no unthreaded area; when screwed tightly between two female fittings, very little of the nipple remains exposed.