Mai mulkin murabba'in dutse
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Granite Square Ruler tare da saman daidaitacce guda 4
Ana ƙera Granite Square Rulers cikin inganci mai kyau bisa ga ƙa'idodi masu zuwa, tare da jarabar manyan ma'auni masu inganci don biyan duk takamaiman buƙatun mai amfani, a cikin bita ko a cikin ɗakin aiki.