Soo saaraha tuubada qurxinta ee birta aan fiicnayn iibka kulul

Dhuumaha birta ee qaabka gaarka ah u qaabaysan waa erey guud oo loogu talagalay tuubooyinka birta ee leh qaabab kale oo iskutallaab ah oo aan ahayn tuubooyinka wareegsan, oo ay ku jiraan tuubooyinka qaabaysan alxanka leh iyo tuubooyinka qaabaysan ee aan sinaba lahayn. Maaddada awgeed, birta-tubo-qaabaysan ee gaarka ah waxay guud ahaan ka samaysan tahay 304 ama in ka badan, iyo adkaanta 200 iyo 201 walxood waa mid xooggan oo dhibka qaabaynta ayaa kordhay. Tuubooyinka gaarka ah ee birta ah ayaa guud ahaan lagu kala soocaa iyadoo loo eegayo qaybta isgoysyada iyo qaabka guud. Guud ahaan waxaa loo qaybin karaa: tuubooyinka birta qaabaysan oval, tuubooyinka birta saddex geesoodka ah, tuubooyinka birta qaabeeya laba geesoodka ah, tuubooyinka birta qaabaysan dheeman, tuubooyinka birta qaabaysan, tuubooyinka birta U-qaabeeya, tuubooyinka D-qaabeeya, xusulada birta ah, S suxulada tuubada qaabaysan, tuubooyinka birta qaab tobanle, wareegyo bir ah oo semi-wareeg ah, tuubooyinka birta qaabeeya laba geesood oo aan sinnayn, tubooyinka birta ee shan-geesoodka ah, tuubooyinka birta qaabaysan labajibbaaran, tuubooyinka birta qaabaysan labajibbaaran. Dhuumaha birta qaabeysan, tuubo bir ah oo qaabeysan oo koon ah, tuubo bir ah oo qaabeysan oo gaar ah, iwm.