A. oil injection air compressor
B. oil free compressor
C. both can
D. unable to determine
Answer: B
Analysis: The semiconductor manufacturing industry has extremely high requirements for compressed air purity, so oil-free air compressors are usually selected.
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.
A. Gas separation and storage B. Home use of C. Commercial places use D. Agricultural production uses answer: A. Gas separation and storage
A. Stable growth B. Volatility growth C. Declining year by year D. Stagnation Answer: A. steady growth
A. Water lubrication B. Oil lubrication C. No need for lubrication D. Special lubricant lubrication Answer: D Analysis: Oil-free air compressors usually use special lubricants to cool and lubricate parts to ensure the purity of compressed air.
A. Price and brand B. Performance, price and brand C. Market share and technological innovation D. Production date and transportation method Answer: C. Market share and technological innovation