A. 0.05 bar
B. 0.1 bar
C. 0.2 bar
D. 0.5 bar
Answer: B
parsing: The pressure drop increases by 0.1 bar per 50 meters of pipeline, and the flow loss is about 2%.
Answer: It is widely used in medical, food and beverage, electronics, pharmaceutical, chemical, textile, and laboratory industries.
A. Water-cooled and air-cooled B. Oil cooled and air cooled C. Water cooling and oil cooling D. The answer cannot be determined: A Analysis: The cooling system of oil-injected air compressors usually includes two types: water-cooled and air-cooled, which are used to cool the compressor and compressed air…
A. Price and brand B. Performance, price and brand C. Appearance and color D. Production date and transportation method Answer: B. Performance, price and brand
A. Poor after-sales service B. The after-sales service network is underdeveloped C. Provide comprehensive after-sales service D. After-sales service is limited to large cities Answer: C. Provide comprehensive after-sales service
A. The whole machine is guaranteed for one year, and the main machine is guaranteed for two years. The whole machine is guaranteed for two years, and the main machine is guaranteed for one year. The whole machine and mainframe are guaranteed for one year D. The whole machine and mainframe are guaranteed for two years. Answer: A. The whole machine is guaranteed for one year, and the main machine is guaranteed for two…