M'mafakitale, kugwiritsa ntchito mpweya woponderezedwa ndikofunikira pazinthu zosiyanasiyana, kuyambira pakugwiritsa ntchito zida zama pneumatic mpaka makina ogwiritsira ntchito. Komabe, kupezeka kwa chinyezi mumpweya woponderezedwa kumatha kubweretsa mavuto ambiri, kuphatikiza dzimbiri, kuipitsidwa, ...
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