Deg yiwen unamek ad naf J.J.Bonnial d R.Amigues sumren-d kradet n twura i wakken ad yili uktazal d amsilɣan. Tamenzut d tawuri tilugnant (régulatrice) i yellan d tagnit i unelmad i wakken ad yesseqɛed tisuddas-is, d tagnit daɣen i uselmad akken ad yefrez tasnedwelt ara ayeḍfar. Tis snat d tanfudant (renforçatrice) i d-yettilin d afud i usfukti n yal axeddim icudden ɣer yiswi. Ma yella d taneggarut d tawuri taseɣtayt i yettmuddu tagnit i unelmad akken ad yeg 1 aseɣti imanay .