Non-well-killing pressurized semi-automatic gate replacing device
HE JING, ZHOU SHOUCHENG, CHEN LONG, WANG NANA, LU HONGYI, ZHAO GUIJIN, GUO TIANBO, HOU JIANFENG, WANG XINQIANG, KOU JUN, YU HAIFENG, LI HE
Year of Publication 08.05.2020
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Year of Publication 08.05.2020
Patent