扁管在任何一个截面均为长圆形，其长短轴根据管心距的大小来确定。

Flat tube in any cross section are oblong, the length of the shaft according to the tube pitch to determine the size of.

youdao

专业生产：玩具球网，针通绳，圆扁绳，松紧绳心及各种手饰品用的绳带。

Professional production: toy ball net, pass the needle rope, round flat rope, elastic rope heart and used a variety of hand.

youdao

专业生产：玩具球网，针通绳，圆扁绳，松紧绳心及各种手饰品用的绳带。

Professional production: toy ball net, pass the needle rope, round flat rope, elastic rope heart and used a variety of hand.

youdao