Ubukhulu bokuhlanganiswa komnyango wensimbi ongashisi umlilo bucaciswe ngokucacile: udadewabo omkhulu weqabunga lomnyango kanye nohlaka lomnyango akufanele kube ngaphansi kuka-10mm, futhi igebe phakathi kweqabunga lomnyango nohlaka lomnyango akufanele lidlule u-4mm.

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