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橡胶芽接树阴阳线相结合的刺激割胶试验敖硕昌,赵淑娟,何长贵(云南省热带作物科学研究所)云南垦区六十年代推广种植的PB86、PR107、RRIM600、GTI等优良无性......
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在2000年的质量万里行中,海南省技术监督局授权海南省天然橡胶产品质量监督检验站对海南农垦天然橡胶产品质量进行了监督抽查。本次抽查......
从1988年全国废旧物资交流会获悉,各类废旧物资销售趋势是:废钢铁:市场的总形势是求大于供。去年国家对废钢铁计划管理放开,大量......
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