Ningxia region has many rich and excellent forest planting resources. Through strengthening the construction and management of the forest germplasm resource pool, it can help to protect precious tree species, desert plants, major native tree species, famous economic tree species …
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Introduction: Cloth drills are also called drills. It is driven by a motor to rotate a needle. When working, the needle is drilled through a stack of cloth, leaving a small hole mark on the fabric. As a positioning mark for sewing, some machines have a po…
There are many garden plants in parks, squares and streets. These garden plants are the most important basic elements in urban greening. In recent years, with the acceleration of urbanization, these garden plants have been introduced and used in large quantities. The type and qua…
Introduction: The gold refers to a processing process that requires a lot of processes and has been widely used in electronic and electrical appliances, communications, automobile industry, medical equipment and other fields.
We know that the circulation of vegetables, fruits, and other agricultural products is complex. Most of the agricultural products that we buy in the farmers' markets and supermarkets come from all directions. How can we avoid “mixing†agricultural products with hi…