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Энэхүү бутлуурыг уурхай, хайлш, барилга, авто болон төмөр зам, усны байгуулатж зэрэг салбаруудад өргөнөөр ашигладаг. Ажиллах зарчим: Цахилгаан хөдөлгүүр нь тууз болон туузан дугуйг хөдөлгөнө. Налуу гол холхивч хөдөлснөөр хацрын дээр доор хөдөлнө, хацар дээш хөдлөх үед тээглүүр хавтан болон хөдлөгч хацрын хоорондын …
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