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.
Answer: It ensures the purity of compressed air, which is essential for food safety and quality.
A. High noise B. Low noise C. High power D. Low power answer: B. low noise
A. 10-20 B. 20-30 C. 30-40 D. 40-50 Answer: C Analysis: The average annual maintenance cost of environmentally friendly oil-free air compressors is 200,000 – 300,000 yuan, which is 30-40 less than traditional models…
Answer: The motor power typically ranges from [C] to [D] kW.