A. higher
B. lower
C. Same as injection air compressor
D. unable to determine
Answer: B
Analysis: Oil-free air compressors do not require replacement of lubricants and oil filters, so maintenance costs are low.
A. General Certification B. Medical certification C. Industrial certification D. No certification required answer: B. Medical certification
Answer: Regular inspections of the air filter, lubrication system, and motor can help prevent premature wear and tear.
A. Color difference B. Orange peel phenomenon C. Fisheye defect D. Hanging answer: C analysis: Oil residue will cause “fish eye” defects on the surface of the car paint, seriously affecting the coating quality.
A. High noise B. Low noise C. High power D. Low power answer: B. low noise
Answer: The GWL Series compressor is produced by Shanghai Gran克林 Group (assuming “Gran克林” is a placeholder for the actual company name, which should be replaced with the correct name if known).