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汽车轮毂锻造工艺设计(铝合金轮毂)

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value of different texture and pH differences between populations. The results showed that, there is obvious difference different texture and pH value of o soil mainly microbial quantity, in which different texture soil fungi, actinomycetes, bacteria population differences reached a significant difference between levels, and different pH, soil fungi, actinomycetes, bacteria reached a very significant difference in the level. Number of different fungi in the soil texture showed loam&gt; clay&gt; sand, actinomycetes and bacteria showed loam&gt; sand&gt; clay; different pH values of soil fungi and bacteria showed pH&gt; 6.5 the highest, 5.5 &le; pH &le; 6.5 Secondly, pH &lt;5.5 minimum; and actinomycetes showed pH &lt;5.5 the highest, 5.5 &le; pH &le; 6.5 second, pH&gt; 6.5 the lowest. <br />

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