Objective To discuss genesic mechanism of trachea arteria anonyma fistula after tracheotomy.

目的探讨切开术后并发名动脉瘘的发生机理。

From the viewpoint of the hydrogeological environment,this paperdescribes the genesic types,prospecting direction and its way of deve-lopment of the spring in Jianregion.

本从水地质环境着手，论安地区矿泉水的成因类型、找矿方向及其开发利用途径。