Adabiyeyaasha flange oo kala duwan oo ay ku jiraan dhexroor weyn oo loogu talagalay in lagu qaado tuubooyinka dhammayska tiran ee leh dhexroorka dibadda ee kala duwan.Adabiyeyaasha flange-ga dulqaadka leh ee hal cabbir ah waxay daboolayaan tiro ka mid ah agabyada tuubooyinka, taasoo ka dhigaysa mid ku habboon hagaajinta iyo dayactirka shaqada yaraynta baahida kaydka weyn ee kaydka.