目前尚未见到壳寡糖与硫酸锰相互作用制备壳寡糖螯合锰的报道。
At present, the report of preparing the chitosan oligosaccharide chelating Mn by the interaction of chitosan oligosaccharide and manganese sulfate is not available yet.
目前尚未见到壳寡糖与硫酸亚铁相互作用制备壳寡糖螯合亚铁的报道。
At present, the report of preparing the chitosan oligosaccharide chelating ferrous by the interaction of chitosan oligosaccharide and ferrous sulfate is not available yet.
水泥搅拌极快速荷载法与慢速荷载法对比试验结果，目前尚未见到文献专门报道。
To the present, it has not been seen the special publication of literature on the result of the comparison test of the quick and slow loading methods of cement mixing piles.
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