Zomwe zimakhudza mtundu wa kuwotcherera kwa malo mu makina owotcherera pafupipafupi ndi awa: pano, kuthamanga kwa ma elekitirodi, zinthu zowotcherera, magawo, nthawi yopatsa mphamvu, mawonekedwe omaliza a elekitirodi ndi kukula, shunting, mtunda kuchokera m'mphepete mwa weld, makulidwe a mbale, ndi kunja. chikhalidwe cha t...
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