1.This? paper systematlly dels with the applied theory and method of angle measuring in volume growing estimation in permanent pont sampling .
本文系统研究了水平角规在固定样点监测材积生长动态中的理论与方法;
2.This paper dels in particular with the lattice of dilemma and its functions and so on.
本文着重介绍二难推理的格和它的作用等问题。