摺線

variant of 折線|折线[zhe2 xian4], broken line (continuous figure made up of straight line segments) / polygonal line / dog leg

variant of 折[zhe2] / to fold

document folded in accordion form / to fold

thread / string / wire / line / CL:條|条[tiao2],股[gu3],根[gen1] / (after a number) tier (unofficial ranking of a Chinese city)

convex polygonal line