1. Tlhahlobo ea ponahalo ea lisebelisoa tsa lipeipi tsa elbow: ka kakaretso, tlhahlobo ea mahlo e hlobotseng ke mokhoa o ka sehloohong. Ka tlhahlobo ea ponahalo, e ka fumana mefokolo ea ponahalo ea liphaephe tsa ho tjheseletsa setsoe, 'me ka linako tse ling e sebelisa likhalase tse holisang makhetlo a 5-20 ho etsa lipatlisiso. Joalo ka ho loma ka bohale, porosity, weld ...
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