First, the content of extracts, plant growth nutrients required are: the main nutrients, secondary nutrients, trace nutrients 3 kinds. The main nutrient is the collective name for nitrogen, phosphorus, and potassium; the sub-quantity nutrient is the collective name for the medium-quantity elements such as calcium, magnesium, and sulfur; and the micronutrient is the collective name for boron, manganese, iron, zinc, and copper. According to state regulations, fertilizer content is a requirement for major nutrients (nitrogen, phosphorus, and potassium), and secondary nutrients and micronutrients are prohibited from labeling content on fertilizer packages. Therefore, unscrupulous companies often play the "nutrient draw" idea, fake on the product's identity, the main nutrient content is seriously insufficient.
Second, the production of raw material quality, there is no effect of content. The calcium, magnesium, phosphorus and other elements needed by plants are all extracted from the ore. Unscrupulous manufacturers often purchase inferior ores, and the quality of minerals extracted from them is difficult to guarantee. In particular, the phosphorus and nutrients needed by plants can only be absorbed by plants in the soluble and active state. Generally, high-quality phosphate ore can be released through the process of calcining and other effective phosphorus content, and it is supplied to plants for absorption. The unscrupulous manufacturers often smash inferior phosphorus ores directly or use barium sulfate to make them. This kind of phosphate fertilizer has no effect except content.
Third, exaggerate the effect of publicity, misleading use. In order to promote products, unscrupulous companies often make articles on product names and descriptions, such as the names of "fat, fat king" and so on. Some manufacturers claim that their products not only enhance nutrition, but also prevent and cure diseases. They can no longer apply top dressing fertilizer. In fact, there is currently no fertilizer to play a mask to the effect.
Types of wheelchairs
1. According to material classification, aluminum alloy, light material and steel aluminum alloy, light material and steel.
2. According to the type, it can be divided into manual Wheelchair and electric wheelchair, among which manual wheelchair can be divided into manual push and self-service type.
3. According to people's needs, it can be divided into single side wheelchair, toilet wheelchair, sports wheelchair and lying wheelchair.
4.According to whether it can be folded It can be divided into foldable and unfoldable wheelchairs.
Wheelchair
Medicare Wheelchair,Multifunction Wheelchair,Wheelchair Rehabilitation,Folding Electric Wheelchair
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