I took this part from internet on which first i created revolve part, after i found difficulty on making round and slot whenever i used to make round and extrude option it will diretly takes me in round and extrude sub-option, but hear i required to edit a part with edit deifination then menu manger will open, with the help of which i redefine the feature.
same hear found a difficulty on Slot- extrude
i attached prt. file please see this