Difficult tunnel escape canal of blockking up
XIE ZHENYI, YANG JUHUI, LI MINGFANG, ZHANG YIBIN, LIU XIAN, WANG PENGDU, TAN JIGUANG, LUO WENXIU, FAN MIN, GONG HUI, LIU YANJIE, HUANG SHENG, OUYANG BIN, ZHANG HUIZHAO, YUE LIN, ZHAO WEI, ZHANG SHENGLIN
Year of Publication 17.08.2018
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Year of Publication 17.08.2018
Patent
Polish with a waterstone and bore convenient to install and use
LI YINGYING, XIE ZHENYI, YANG JUHUI, LI MINGFANG, ZHANG YIBIN, WANG PENGDU, LIU XIAN, TAN JIGUANG, TANG JIANGHU, LUO WENXIU, GONG HUI, PENG WENJIE, ZHA LI, HUANG SHENG, OUYANG BIN, ZHANG HUIZHAO, YUAN CHANGFA, YUE LIN, LI HONGMEI, ZHAO WEI, ZHANG SHENGLIN
Year of Publication 28.08.2018
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Year of Publication 28.08.2018
Patent