Layers may pertain-to a spiral.Logical formLearned from2 sentences. (Spiral steel stays) may be curved with a figure.Logical formLearned from2 sentences. A (spiral torsion spring) can be constituted-of-or-filled-with (metal ribbon).Logical formLearned from2 sentences. An aircraft may enter a (spiral dive).Logical formLearned from2 sentences. A (spiral pattern) can be regular.Logical formLearned from2 sentences. (Spiral tunnels) can be famous.Logical formLearned from2 sentences. A spiral can be slippery.Logical formLearned from2 sentences. Revolutions may pertain-to a spiral.Logical formLearned from2 sentences. A (cast iron spiral staircase) may pertain-to a tower.Logical formLearned from2 sentences. (Spiral grooves) can be regular.Logical formLearned from2 sentences. A spiral may be named after a male.Logical formLearned from2 sentences. A consultant can be for (spiral consulting).Logical formLearned from2 sentences. Spirals can be evocative of a tree of life.Logical formLearned from2 sentences. An aircraft can be in a spiral.Logical formLearned from2 sentences. A (spiral illusion) may pertain-to a male.Logical formLearned from2 sentences.