Makina opanga mankhwala和di zida zimagwira nchito yofunika kwambiri popanga, ndipo monga kutulutsa, gawo la valve yozungulira potseka mpweya, zinthu zotumizira和didizofunikiranso m' mamaakitale akuluakulu opanga mankhwala。Kuyambira pa zinthu, ndondomeko, kapangidwe和di EH…
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