English to Russian Tech/Engineering Chemistry; Chem Sci/Eng

Здесь образуется 3-6-членное спирокольцо, содержащее атомы углерода?

when two R2 groups are attached to two different carbon atoms, they may combine to form a 1 to 3 membered carbon atom bridge over ring B;
when two R2 groups are attached to the same carbon, they may combine, together with the carbon atom to which they are attached, to form a 3 to 6 membered carbon atom containing spiro ring;