Maƙallin maƙallin tsakiya da aka riga aka ƙera yana da ƙira mara ƙulli don haɗa bututun ƙarfe mai ƙarancin tsari na ƙwararru. Ana iya shigar da waɗannan maƙallan cikin sauri a cikin filin ta amfani da kayan aikin hannu na tsakiya. Ana samun su a cikin ƙarfe mai siffa 300 da kuma a cikin ƙarfe mai galvanized. Ana buƙatar kayan aikin maƙallin tsakiya (kamar yadda aka nuna) don shigarwa. Akwai kuma kayan aiki mai ƙanƙanta da araha don ƙaramin bututun diamita. Kauri na maƙallin tsakiya yana tsakanin inci 0.25 zuwa 0.31, ya danganta da diamita na maƙallin. Don ƙarin bayani ko cikakkun bayanai game da samfura, da fatan za a iya tuntuɓar mu.

Babban Kasuwa: Rasha, Spain, Amurka, Italiya, Kanada da sauransu