Igumbi elihlangenwe yimvelo elawulwa elenzelwe ukugcina amazinga aphansi kakhulu wodaba lokubandakanya njengothuli, ama-microorganisms ahamba ngezindiza, izinhlayiya ze-aerosol kanye namakhemikhali amakhemikhali. Lezi zindawo ezilawulwa ezilawulwayo zibalulekile ezimbonini ezinjengezimboni ezinjengemithi, i-biotechnology, i-elekthronikhi, kanye ...
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