Ngenxa yobume bendawo yalo, igumbi lokusebenza esibhedlele lihlala lifuna ucango lwegumbi lokusebenza ukuba libe nemisebenzi ye-hermeticness, ukugquma kwesandi, ukugcinwa kobushushu, ukumelana noxinzelelo, uthuli, ukuthintela umlilo kunye nokukhusela i-radiation.Ho...
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