A spiral may undergo an approximation.Logical formLearned from2 sentences. (Spiral separators) can be dry.Logical formLearned from2 sentences. (Spiral separators) can be wet.Logical formLearned from2 sentences. A (spiral walkway) may rise.Logical formLearned from2 sentences. A (spiral staircase) can be with some steps.Logical formLearned from2 sentences. A spiral may undergo windings.Logical formLearned from2 sentences. A spiral can be warped.Logical formLearned from2 sentences. A spiral can be in a world-city.Logical formLearned from2 sentences. (Spiral lines) can be weak.Logical formLearned from2 sentences. A spiral may pertain-to a viaduct.Logical formLearned from2 sentences. (Spiral grooves) can be constituted-of-or-filled-with width.Logical formLearned from2 sentences. A sculpture may show (spiral cords).Logical formLearned from2 sentences. (Spiral ribs) may undergo an intersection.Logical formLearned from2 sentences. A (spiral worm) may be added from an end.Logical formLearned from2 sentences. A spiral can be at work.Logical formLearned from2 sentences.