bm = 1d double stud nthawi zambiri imagwiritsidwa ntchito polumikiza mbali ziwiri zolumikizidwa ndi zitsulo; bm=1.25d ndi bm=1.5d double stud nthawi zambiri amagwiritsidwa ntchito polumikiza cholumikizira chachitsulo...
Malinga ndi mphamvu yolumikizirana, imagawidwa m'mabowo wamba komanso omangika. Malingana ndi mawonekedwe a mutu: mutu wa hexagonal, mutu wozungulira, mutu wapakati, mutu wotsutsa ndi zina zotero.