... 股东本位主义 self-centeredness of stockholders 整地方式 soil method preparation 盈利结构 profit mix ...
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The invention relates to a heavy metal-polluted soil masonry and a preparation method thereof.
本发明涉及一种重金属污染土壤砌体及制备方法。
The invention relates to a farmland soil water-holding agent, in particular to a soil water-holding agent and a preparation method thereof.
本发明涉及农田土壤保水剂，具体是一种土壤保水剂及其制备方法。
A soil sample preparation method was established for extracting phenol with the aid of ultrasonic energy.
以合成土样为对象，研究了超声波辅助提取苯酚的条件及其提取效率。
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