Novel winding pipe heat exchanger with shell side capable of being cleaned online von WEI WEN, JIAO WENRANG, WANG WUYI, LIU JIAGANG, LYU JIANCHAO

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High-pressure feeding oil pump sealing structure in oil residue hydrogen production device von JIAO WENRANG, ZENG TINGFU, YAN JICHEN, LI ZHI, WU BO, WANG YANWU, LAI CHAOXI, WEI JIANMIN, PAN DONGMING, CHENG YONG, LEE YOUNG-GAB, YANG HAIYONG

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Mechanical seal structure subassembly of pump von Li Guangye, Liu Fu, Liu Zhenzhong, Liu Qiang, Liu Xiuzhen, Zhao Zhigang, Guo Shouxiang, Cao Boyuan, Liang Deyin, Jiao Wenrang

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Ladder assembly von JIAO WENRANG, LI CHUNNIAN, LI DEQI, SONG XIAOQIAN, NAN YADI, JIA DONGMEI, LIU ZHENZHONG, LIANG DEYIN, CAO WEIBO, YU QIANG

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A apron for covering establish trench von ZHAO ZHIGANG, ZHANG BO, TIAN JIEDONG, LI JIANHUA, DING TIANTIAN, MA JIAN, NAN YADI, GUO JIANWEI, XIE JUN, LIU ZHENZHONG, YANG CHUNMEI, WANG JIN, HAN QINGQING, JIAO WENRANG, LI CHUNNIAN, PAN CONGJIN, LI GAOBO, ZHANG CHAO, CAO WEIBO

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