致密成型耐火材料制品 Dense shaped refractory products
耐油耐高温O型密封圈 Hot Resistant O-ring
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以耐密型玉米品种“吉单209”为试材，研究了不同氮、磷用量对玉米籽粒产量和营养品质的影响。
The effects of different nitrogen and phosphorus application on grain yield and qualities of compact corn Jidan 209 were studied.
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