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1·The authors place double tract sac thoracic duction instrument through authors cannulation to treat cases open pneumothorax, recovered 0 cases, 7 %;

应用经套管针置入双腔气囊式胸腔引流装置治疗开放性气胸 例，治愈0例，占7．％；

2·The digitalization of metal mines can help to fully exploit the resource, efficiently carry out the mine p duction, reduce the workers'labor strength and raise both the economical and social benefits.

金属矿山数字化可以充分开采资源，高效进行矿山生产，降低工人劳动强度，提高矿山企业经济、社会效益。