bm=1d i-double stud ngokuvamile isetshenziselwa ukuxhumana phakathi kwezingxenye ezimbili zensimbi ezixhunyiwe; bm=1.25d kanye ne-bm=1.5d i-double stud ngokuvamile isetshenziselwa ukuxhuma phakathi kwesixhumi sensimbi eyinsimbi...
Ngokwemodi yamandla yokuxhuma, ihlukaniswe yaba izimbobo ezijwayelekile nezinamaphiko. Ngokuma kwekhanda: inhloko eyi-hexagonal, inhloko eyindilinga, inhloko eyisikwele, inhloko eshona phansi nokunye.