短語(yǔ)詞組短語(yǔ)spiral easement curve 螺鏇緩和曲線;螺鏇型緩和曲線spiral curveclothoid curve 螺鏇曲線spiral transition curve 緩和曲線;螺鏇型緩和曲線Spiral -curve cut 活鏇切法spiral easement curve west bank 螺鏇緩和曲線part of spiral curve 部分廻鏇線incomplete spiral curve 不完全緩和曲線nth spiral curve n 次廻鏇線spiral curve location [測(cè)]緩和曲線測(cè)設(shè) 返回 spiral curve