Fomunim Fol ndi mtundu wa zinthu za aluminiyamu. Aluminium zojambulazo makamaka ndi makulidwe. M'makampani, Zogulitsa za aluminium ndi makulidwe osakwana 0.2mm nthawi zambiri imatchedwa aluminium zojambulazo. Nthawi yomweyo, Malinga ndi makulidwe, Zojambulazo za aluminium zitha kugawidwa mu zojambula ziwiri, Zojambulazo zokhazokha ndi zojambula zolimba, ndiye kodi mukudziwa kusiyanitsa pakati pa zingwe za zero ndi zopondaponda kawiri?
Izi ndizosavuta kusiyanitsa, ingoyang'anani makulidwe, zopindika zopanda pake: zojambula ndi makulidwe a 0.01mm ndi ochepera 0.1mm, Zojambula za zero: Wotchedwa Stre Szro Streil amatanthauza kuti pali ziwesi ziwiri pambuyo poti makulidwe amayeza mu mm zojambulazo, nthawi zambiri zojambula zocheperako .0075 mm makulidwe.