Umlawuli weGranite Square
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I-Granite Square Ruler eneendawo ezine ezichanekileyo ezine
IiGranite Square Rulers zenziwe ngokuchanekileyo okuphezulu ngokwemigangatho elandelayo, kunye nomlutha wamanqanaba aphezulu okuchaneka ukuze kwaneliswe zonke iimfuno zomsebenzisi ezithile, zombini kwindawo yokusebenzela okanye kwigumbi lemetrological.