Simple furrow opener von LU YING, YEUNG CHUN WING, HUANG ZHANWEI, ZHAO GUANGCHAN, ZHAO LIMEI, WANG JIESHENG, WANG ZHITAO, LU JUNSHAN, HUANG QI, WANG MULIN, HWANG SANG-KYU, LI MINGXING, LU HUIQIONG, LI WANXING, NIE GENRONG, ZUO XINGJUN, ASAYOSHI, TAN TINGKE

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