Ibisanzwe Byiruka bya Roller

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.Uku kudahuza kuganisha ku gisekuru cyigicucu gike (cyijimye) muburyo bugari.Inzira ni diagonal ku ntangiriro no kurangiza ya zone yipakurura.Kuburyo bubiri-bwikurikiranya bwa roller aho umutwaro umwe ushyirwa kumuzenguruko w'imbere,

(K) yerekana kwiruka kumurongo winyuma munsi yumutwaro wa radiyo mugihe

(L) yerekana kwiruka kumurongo winyuma munsi yumutwaro wa axial.

Iyo kudahuza kubaho hagati yimpeta yimbere ninyuma, noneho ikoreshwa ryumutwaro wa radiyo itera inzira yo kwiruka kugaragara kumpeta yinyuma nkuko bigaragara muri (M).