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?2015年11月(yue)25日(ri)，發明專利《一種長效鋅肥(fei)及其(qi)制備方(fang)法(fa)》獲(huo)得(de)授權，專利號為ZL201310132744.4。?
0335-8500208
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河北省秦皇島市經濟(ji)技(ji)術開發區秦皇西(xi)大街78-1號
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