Kugwiritsa ntchito malaya abwino ndi oyipa mu engineering

Ulusi wowongoka ukhoza kugawidwa mu: mtundu wokhazikika, mtundu wa zomangira zabwino ndi zoipa;
A. Mtundu wokhazikika wa m'mimba mwake womwewo - umagwiritsidwa ntchito potembenuza chitsulo cholimbitsa mwaulere, choyamba kulungani lamanja pachitsulo chimodzi, kenaka piritsani chitsulo china m'manja kuti chilimbitse.
B. Same-diameter positive and negative screw fastenner - yogwiritsidwa ntchito pamene kulimbitsa sikungathe kusinthasintha, mipiringidzo iwiri yolimbikitsa imatha kumasulidwa kapena kumangidwa mozungulira pozungulira mkono.

Kodi mungadziwe bwanji ngati ulusiwo ndi wabwino kapena woipa?
Mutha kugwira ulusi wa ulusi ndi dzanja lanu lamanja. Ngati ngodya yozungulira ya ulusi ili kumbali ya chala chachikulu, ndiye ulusi wabwinobwino.
Ngati ziri zosemphana nazo, izo ziri zosiyana.

Ndi liti pamene ndiyenera kugwiritsa ntchito ulusi wowongoka wokhala ndi ulusi wabwino ndi woipa?

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