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What kind of fertilization method is used for crops is a key issue for improving fertilizer utilization and increasing crop yield. If fertilization is not properly done, it will not only cause waste, but also reduce the effect of fertilizer on reducing the benefits. Therefore, scientific and ration-----
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1. If the burned area of ​​the cylinder mat is small, use an asbestos thread to fill in. When the burned area is large, you can cut a patch from the same part of the waste cylinder gasket at the same thickness and gently tap it to make the joint well. If the burnout is between two cyl-----
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