CREATE TABLE table_70792 ("Model" TEXT, "Specification" TEXT, "Build date" TEXT, "Total produced" FLOAT, "Wheel arrangement" TEXT, "Prime mover" TEXT, "Power output" TEXT)

Which wheel arrangement had a Specification of dl-700?
SELECT "Wheel arrangement" FROM table_70792 WHERE "Specification" = 'dl-700'
SELECT "Wheel arrangement" FROM "table_70792" WHERE "Specification" = 'dl-700'