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

目的探讨管切开术后管无名动脉瘘的生机理。

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.

本从水质环境着手，论述了区矿泉水的成因类型、找矿方向及其开利用途径。