Tea green leafhopper is one of the most important pests in tea plants and one of the most difficult pest species in tea gardens. They are fast-growing, small in size, large in number, and capable of flying and jumping. They have been very wild in the tea garden. However, after th.......
S&A received a phone call from Ms. Peng, who told us that CW-5200 water chiller they had purchased was received with packaging integrity and had been used for the cooling of their resistance welding machine. Also she expressed her thanks for our consider.......
(1) Step sinking
(2) sliding
Refers to the phenomenon that the slope rock mass moves down along a certain plane or curved surface in a large range under the action of its own weight or other external loads. This plane or surface is called the sliding surface, and the rock bo.......
1, Â Â Straight pipe section requirements
In order to improve the effect of eddy current and flow field distortion, the flow meter is installed on the front and rear straight pipe sections with certain requiremen.......
China increased its holding of US Treasury securities for the fourth consecutive month, the latest data from the US Treasury Department showed.
China’s car sales are expected to reach 35 million in 2025, while new energy vehicles have a market share of at least 20%. The Ministry of Industry and Information said in the market "road map" that China's u.......
First, the causes of cavitation
Cavitation is caused by the liquid vaporization, the liquid molecules escape the liquid surface, a process of gas molecules, known as "vaporization." The degree of vaporization of liquid pressure and the size of the high and low temperature.......
At present, although there are many automatic Kjeldahl analyzers available on the market, some titrators still use the photoelectric method of determining the filters and diodes. The result of this determination is largely deviated. Actual value. The ZDDN-II automatic Kjeldahl ni.......