As a high-pressure cleaner for city sanitation vehicles, it began to transform from the first large-scale vehicle to a small high-pressure cleaner . Whether .......
Ultrasonic flowmeters are instruments that measure volume by detecting the effect of ultrasonic pulses on fluid flow. Closed pipes are classified according to the measurement principle using ultrasonic flowmeters: (1) propagation time method; (2) Doppler effect method; (3) wave to offset m.......
Israel’s economic strength is strong and belongs to the developed countries of the Middle East, and its main ethnic group, the Jews, has always been known for its shrewdness. Israelis have strict standards for the choice o.......
The key to "superconducting power transmission" - the technical development of transmission cables has basically ended. Transmission power loss will be accompanied by the use of superconducting power and dropped. Commercial operation will start within 5 years. As an ene.......
With the continuous improvement of society, the level of agricultural modernization in our country has also been rapidly increased. The logistics of agricultural products has made great progress. However, due to the features of perishable, large-quantity and regional planting of .......