criterion2 = smesh.GetCriterion(SMESH.FACE, SMESH.FT_Area, SMESH.FT_LessThan, 90)
filter = smesh.GetFilterFromCriteria([criterion1,criterion2], SMESH.FT_LogicalAND)
ids = mesh.GetIdsFromFilter(filter)
criterion2 = smesh.GetCriterion(SMESH.FACE, SMESH.FT_Area, SMESH.FT_LessThan, 90)
filter = smesh.GetFilterFromCriteria([criterion1,criterion2], SMESH.FT_LogicalAND)
ids = mesh.GetIdsFromFilter(filter)