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Guhaguruka Kumurongo Uhoraho Kuguruka Kubibumbano
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Imashini yoroheje ya Auger
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Tapered Twisted Tape Turbulator Yinjizamo Ubushyuhe Bwongererwa Ubushyuhe bwa Fire Tube Gas Amavuta ya Steam Boiler
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Segment Helical Blade, byoroshye guterana no gusudira
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Gukomeza Spiral Blade, hamwe nubunini buhoraho, umurongo uhindagurika mugutunganya urupfu