单词angl-
网络: 用黄金交换木材；血管生成素；可爱吧
The angle between the vertical surface of the welding part and the groove is called groove face angl e.
焊件表面的垂直面与坡口之间的夹角叫做坡口面角度
an acute angl a rectangle the diameter of a circle
锐角长方形圆的直径半圆