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。
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。
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.
目的：找出医院营养工作的症结，提高营养膳食就餐率。方法：对我院1998年3月入院的230名住院病人，采用横断面调查法进行了病员就餐情况调查。
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