A. Annex B
B. Annex C
C. Annex D
D. Annex E
Answer: C
parsing: Gas production standard corresponds to ISO 1217 Annex D.
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 compressor uses water instead of oil to lubricate the screw elements, eliminating the risk of oil contamination in the compressed air.
A. Low noise B. Efficient and stable C. Portable D. Medical certification answer: B. Efficient and stable
Answer: It ensures the purity of compressed air, which is essential for food safety and quality.
Answer: Follow the manufacturer’s instructions for draining and refilling the water tank.