Amaphrofayili ensimbi, njengoba igama libonisa, ayinsimbi enomumo othile wejometri, owenziwe ngensimbi ngokusebenzisa ukugoqa, isisekelo, ukubunjwa nezinye izinqubo. Ukuze kuhlangatshezwane nezidingo ezahlukene, yenziwe yaba yizimo ezihlukene zesigaba njenge-I-steel, i-H steel, i-Ang...
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