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Хүдэр бутлах төхөөрөмжүүдийн ангилал Мөн бутлуурын зориулалт, хүдрийн ширхэглэлээс нь хамааруулж дараах байдлаар ангилна. том шатны бутлалт дунд шатны бутлалт жижиг шатны бутлалт 11. Уулын баяжуулах үйлдвэрүүдийн хэрэглээ Хүчин чадал ихтэй баяжуулах үйлдвэрүүдэд том, дунд, жижиг шатны бутлалтанд ихэвчлэн конусан …
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