Ukufakelwa okungu-321 kuhlanganisa indinganiso ye-auntenitic auntenitic acrenings ukufakwa kwezinsimbi kwezicelo zokucindezela kwamapayipi. Izinto zokufakelwa kwamaphayipha zizobandakanya ukujeziswa, imigoqo, amapuleti noma amapayipi angenamthungo noma anezinwele. Ukwakha noma ukwakha imisebenzi kuzokwenziwa ngesando, ukucindezela, ukubhoboza, ukukhiphela, ukuqeda, ukuqeda amandla, ukugoqa, ukugoqa ukuthuka, imishini, noma inhlanganisela yemisebenzi emibili noma ngaphezulu. Zonke izesekeli kufanele zithathwe ukushisa.