In the process of agricultural production, the excessive use of pesticides in excess of the range is the most important cause of the current residue of pesticides . In order to prevent pesticide residues from exceeding the standard, it is recommended that farmers' friends
In southern China, rice often has black streaked dwarf disease. Many farmers call it "dwarf grass". In recent years, dwarf grass is the latest viral disease, which has a strong burst, spread and spread. The speed is very fast, and the damage to rice is also very larg
Since 2009, due to the dual impact of the international financial crisis and the macro-control of the property market, hardware lock companies have entered a long cold winter. However, while the traditional hardware industry is increasingly quiet, the smart home industry represented by ele
one. Lock industry overview [A] Basic situation 1. Domestic market situation At present, China is the world's largest producer and consumer of locks. The manufacturers are mainly concentrated in Zhejiang, Guangdong, Shanghai and Shandong. In the category layout, Zhejiang Wenzhou forms a traf
Home>Bearing knowledge>Roller bearing heating device method /*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Rolling bearing heating device method Source: China Bearing Network Time: 2013-03-21 /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; R
When nitrogen-deficient rapeseed is deficient in nitrogen, the leaves are yellow, the growth is weak, and the plants are short. Generally, nitrogen-deficient red leaves are prone to occur during drought and de-fertilization. Remedy: Apply 7.5 kg of urea per acre, or apply 15 to 20 kg of ammonium b
Since ancient times, the display and placement of crafts have been particularly important. He is the embodiment of interior design, not only can play a decorative role, but also highlight the character of the owner. Therefore, the placement of handicrafts should be taken seriously. First of a
Spring is coming, and the climax of the renovation has begun. There are many problems in the purchase of building materials in the decoration. How to choose the wardrobe is also one of them. You can find out, I believe that the purchase of the wardrobe will help. The first is the appearance +
Circuit breaker: A mechanical switching device that can turn on, carry, and disconnect current under normal circuit conditions, and can also be turned on, carrying a certain time and breaking current under specified abnormal circuit conditions.
Reactive Dye Printing ThickenerThickener for Rea
In recent years, the rapid growth of the lock industry has attracted particular attention. At present, the industry's sales are about 40 billion yuan, and the output is 1.9 billion. According to customs statistics, the average annual export growth rate of the lock industry during the Ã