Haɗe-haɗen ƙusa sabon nau'in samfurin ɗaure ne. Ka'idar aikinsa ita ce amfani da bindigar ƙusa ta musamman don kunna bindigar a cikin ƙusa hadedde, ƙone shi, da sakin kuzari don fitar da nau'ikan kusoshi kai tsaye cikin ƙarfe, siminti, aikin bulo, da sauran abubuwan da aka gyara, gyara abubuwan ...
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