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Машин гэдэг нь дор хаяж нэг хэсгээс бүрдэх төхөөрөмж юм. Тохируулах гүйдэл, удирдлага эсвэл цахилгаан хэлхээг ашиглаж хөдөлдөг янз бүрийн хэсгүүд. СЕ машин, тоног төхөөрөмж дээр тэмдэглэгээ хийснээр эдгээр машинууд ажиллаж, ажиллаж байх үед хүмүүсийн эрүүл мэнд, байгаль орчны аюулгүй байдалд заналхийлдэггүй болохыг …
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