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.
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。
2
A new method which neither center stakes nor cross - sectional directions about route layout side slope stakes from traverse stations, is discussed in this paper.
提出一种无需放样路线的中桩，也无需测定横断面方向，在导线点上直接放样路线边线的新方法。
3
To find the problem of hospital nutrition works and improve the dining rate of inpatient in nutrition center cross-sectional study about 230 inpatients hospitalized in March 1998 was made.