Language : English
周福宝

Patents

提高煤层钻孔瓦斯抽放浓度的二次封孔方法

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Disigner of the Invention:张仁贵,昃玺,刘应科,李金海,姜铁明,王军,甘小根

Note:张仁贵,昃玺,刘应科,李金海,姜铁明,王军,甘小根

Type of Patent:国内

State of Patent:专利授权

Application Number:200810023609.5

Authorization number:2011-06-08

Number of Inventors:8

Service Invention or Not:no

Application Date:2008-04-10

Authorization Date:2011-06-08

First Author:周福宝