What kind of certification does environmentally friendly oil-free air compressors need to pass to prove their oil-free performance?

A. Monthly B. Quarterly C. Once a year D. The answer depends on usage: D. Depending on usage

A. Adopt noise reduction design B. Increase noise C. Reduce power D. Reduce maintenance Answer: A. Designed for noise reduction

A. Theoretical value of exhaust volume B. Actual gas production demand C. Equipment appearance size D. Brand market ranking answer: B Analysis: Selection should take actual gas production demand as the core parameter.

A. Backwardness of energy-saving technology B. Advanced energy-saving technology C. Don’t pay attention to energy-saving technologies D. General answer to energy-saving technology: B. Advanced energy-saving technology

Answer: The advantages include no oil contamination, low maintenance costs, long service life, and high energy efficiency.