Explanation of spiral (1) [spiral; Helix]: Curve spiral development similar to snail shell texture (2) [Spiral]: A simple machine with inclined plane, which consists of a solid cylinder with spiral groove and a hollow cylinder with corresponding groove. External force acts along the spiral route of the groove, and resistance acts along the axis of the cylinder (1). Tang Xuanzang's Records of the Western Regions of the Tang Dynasty: "There is another Tathagata with blue hair color, which turns to the right, leads to a long ruler and can be rolled by half an inch." Qing Ye Yan Ting's poem "Oubei Li Yuhua Lanqing" reads: "When you spin it, it opens." Qin Mu's "Flower City Praises Experts in Fishing and Hunting": "Seeking common ground in differences, but also seeking differences in the same, so repeatedly seeking, such as climbing a spiral ladder and climbing stairs." (2). Metaphor things zig zag. Lu Xun's A Brief Introduction to Flowers in the Morning: "China's writing is standard, and the world is still spiral." (3). Simple machinery. The thread on the surface of the cylinder is called male thread, and the thread in the hole of the object is called female thread. The male and female groups are screwed together, and one of them can be rotated to move along the thread. Screws are widely used in machinery, such as screws and jacks.

Word decomposition

The explanation of snail is a mollusk, which is covered with a conical, spindle-shaped or oval hard shell with a spiral line: snail. Snail conch Conch. Mother of Pearl Pharmaceutical (a Buddhist musical instrument made of conch shells). Shell texture: thread. Spiral. Fuck it. Nuts. Bolt. Explanation of the spiral of bun (snail shell hairstyle of ancient women) Spin × Turn: Winding. Spin. Flutter and spiral staircase melody. Hovering. Everything is spinning. Return: triumph. Soon: immediately (for a very short time, such as "spinning away"). Soon. Joint with or between parties: deal with. Mediation. There was a "whirlpool" in ancient times, whirlpool. Last name.