图上有各种形式的线条，诸如：边框线、实线、虚线、剖面线、中心线、引出线、尺寸线、断裂线、假想线。
There are various types of lines on the drawing such as: border lines, visible lines, invisible lines, break lines, phantom lines.
结果发现，在反转半径外的振幅太大，并且在破裂之前温度剖面太平坦，而中心温度较低。
It shows that the amplitude is too large outside the reverse radius and the electric temperature profile is too broad before collapse and the central temperature is too low.
从平面形状、剖面形状、发育高度及中心轴变化方面，总结了华北煤田陷落柱的几何特征。
The geometrical characteristics of sunken column in North China Coalfield is summarized from the aspects of its planar shape, sectional shape, development height and axle center change, etc.
应用推荐