I-valve licandelo lolawulo kwinkqubo yothutho lwemibhobho, enokusetyenziswa ukulawula ukuhamba komoya, amanzi, umphunga, imidiya eyahlukeneyo eyonakalisayo, udaka, i-oyile, isinyithi esilulwelo kunye nemidiya ye-radioactive. Kwishishini lamachiza, ukusetyenziswa kweevalvu ezinkulu. Umzekelo, kwi-pharmaceutical indus...
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