NM Collings
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Nanga Collings ndi kangaude wa NBR, lembani 50, 67, 97, 57, 128, 128, 168, 168, 168
NM Kuphatikiza kwa nm kumakhala ndi ziboli ziwiri komanso mphete yosinthika yomwe imatha kulipira mitundu yonse ya shaft. Kusinthasintha kwa Nitrable rabara (NBR) yomwe imakhala ndi mawonekedwe okwera kwambiri omwe amathandizira kuti achotseke ndi kumangika mafuta, utoto, mafuta, mafuta, ozoni ndi mankhwala ambiri amasungunuka.