Guhitamo ibikoresho nibikorwa biranga ibyuma bitagira umwanda
icyuma kitagira ibyuma ni ubwoko bwa valve ikozwe mubikoresho byuma bidafite ingese, kubera ko irwanya ruswa nziza, imbaraga zubushyuhe bwo hejuru hamwe na okiside, ikoreshwa cyane muri peteroli, imiti, metallurgie, ubwubatsi nizindi nganda. Th ...
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