Tendril unbranched or bifurcate. Inflorescence usually a polychasium. Seeds elliptic, obovoid-elliptic, or obtriangular, surface smooth, corrugated, or with strumose protuberance or ribs.
Two patterns of air plane engine inlet hot-air anti-icer are introduced in this paper, one is circumferential anti-icer, the other is double skin corrugated chord direction anti-icer.
This is made possible through something called a lenticular lens – a corrugated sheet in which each ridge is made up of a convex – or outward-curving – lens.