Development and research of hydraulic and pneumatic system principle CAD software HPHAD Zhang Liping College of Mechanical and Electronic Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 5, 54 teamware tax software with 1898 as working platform gamma, æ°š14.......
In October, the general contractor and supervisory representative of the copper smelting project of Chinalco Southeast Copper Co., Ltd. visited and inspected and guided the metallurgical pl.......
The problem of falling flowers and falling fruits of tomatoes can be solved by the method of spraying and sputum-proofing (tomato spirit). However, we must pay attention to the following four points in the application:
First, master the nature of the drug
Compared with 2,.......
First, master the nature of the drug
Compared with 2,.......
Three-month composite trading closing support resistance at 14th RSI 10th MA 30th MA copper 3,047.00 * 3000 * 3100 * 42.0 * 3049 * 3133 aluminum 1,739.00 * 1720 * 1775 * 41.0 * 1741 * 1777 London June 1 news : Traders said that the London Metal Exchange (LME) copper fell slightly at the beginni.......
Quantitative fertilization technology mainly includes two aspects. One is to adjust the proportion of nutrients such as nitrogen, phosphorus and potassium to become balanced fertilization. The other is to cooperate with different fertilizers to regulate the proportion of nutrient supply du.......
Aphids are pests with the largest amount of vegetables and the longest period of damage. As the application rate of pesticides increases year by year, the resistance of aphids increases year by year. Therefore, the use of pollution-free treatment can improve the control effect and reduce t.......
Soybean root rot occurs in soybean planting areas and is aggravated in continuous cropping, mountainous areas and low-lying conditions. Deficiency incidence resulting field, yellow, cut, cut generally 10 to 30 kg. As the price of soybeans rises, it will inevitably lead to an increase in th.......
The following is a daily review of base metals transactions published on the 9th of June by Amalgamated Metal Trading Limited (AMT), a leading brokerage of the London Metal Exchange (LME). Copper: Not available. Aluminum: Not provided. Zinc: Not provided. Tin: The price of zinc further encounte.......