A. General Certification B. Medical certification C. Industrial certification D. No certification required answer: B. Medical certification
A. Portable air compressor B. Industrial air compressor C. Medical air compressor D. Mine air compressor Answer: A. portable air compressor
A. Higher B. Lower C. Same as oil injection air compressor D. The answer cannot be determined: B Analysis: Oil-free air compressors do not need to replace lubricants and oil filters, so the maintenance cost is low.
Answer: It includes regular inspections, changing the lubrication water, and cleaning the air filter.
Answer: It is designed to be energy-efficient and environmentally friendly, with low energy consumption and zero emissions.