A. Pure compressed air
B. low manufacturing cost
C. maintain complex
D. high energy consumption
Answer: A
Analysis: The main advantage of oil-free air compressors is that their compressed air is pure and oil-free, which is suitable for occasions with high requirements for compressed air purity.
A. 50% B. 60% C. 75% D. 80% answer: C analysis: Environmentally friendly oil-free air compressors reduce oil pollution, thereby reducing the frequency of filter replacement and optimizing maintenance costs.
A. Higher B. Lower C. Same as oil injection air compressor D. The answer cannot be determined: A Analysis: The manufacturing cost of oil-free air compressors is usually high, and the initial investment is large, but the long-term maintenance cost is low.
A. Low noise B. Efficient and stable C. Portable D. Medical certification answer: B. Efficient and stable
A. B. major cities in the world Home use, commercial use C. Oil and gas, construction, logistics D. Manufacturing, oil and gas, construction Answer: A. major cities around the world
A. Small flow B. Low power C. Not suitable for occasions with small gas volume and too high pressure ratio D. Complex structure answer: C. Not suitable for occasions with small gas volume and too high pressure ratio