Njira zopangira mphira, zomwe zimadziwikanso kuti njanji za rabara, zakhala gawo lofunikira kwambiri pantchito yomanga, makamaka kwa ofukula ndi ofukula ang'onoang'ono. Kugwiritsa ntchito njanji za mphira kwasintha momwe makina olemera amagwiritsidwira ntchito, kupereka mphamvu yokoka, kuchepetsa kuwonongeka kwa nthaka ndi ...
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