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Imboni yemishini yezimboni kanye nezinto zincike kakhulu kuma-boteners kanye nezixhumi ukuqinisekisa ukuhlangana nokusebenza okufanele kwe-mac izakhiwo. Uhlobo olulodwa olusetshenziswa kabanzi yi-DIN7991 Allen countersunk head screw. Kulesi sihloko, sizohlola imininingwane yalezi zikrufu, sihlola izici zazo, izicelo nezinzuzo zazo. I-DIN7991 Allen countersunk yena