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(2)Аюулгүй жолоодох үндсэн мэдлэг (Part 1) 1. Механизмыг асаах үед орчны аюулгүй байдлыг баталгаажуулсны дараа хөдөлгүүрийг тохирсон хурдаар ажиллуулж, ажлын аппаратыг 40см орчмоор нэмэгдүүлнэ. 2. Машинаар толгодын өөд уруу явах үед аль болох шулуун яваарай. Хэлтгий гадаргууд унах эрсдэлтэй байдаг учраас чиглэлээ бүү өөрчил.
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