The na tattalin arzikikumam amfanina bugu bar neabin ya shafa by da yawa dalilai irin wannankamar:abu ciyarwa, rotor gudun, ruwaabun ciki naabu, girmannaabushigar,rabonamurkushewada dai sauransu.
Lokacin szabesandar busa, ko da yaushela'akari da bi maki:
- Meneneabu sokasancemurkushe(e.g.rushewa kankare)?
- Menenegirmanshineabushigar (misalimaximum shigargirman60mm) ba?
- Isdaabu uku-dimensional ko lebur?
- Whula ne kewayon abrasiveness?
Lokacin aikawa: Agusta-02-2021