A. 1-3%
B. 8-12%
C. 15-25%
D. 30-40%
Answer: C
parsing: The clearance volume of reciprocating air compressors causes a 15-25% reduction in efficiency.
A. Annex B B. Annex C C. Annex D D. Annex E Answer: C Analysis: The gas production standard corresponds to ISO 1217 Annex D.
Answer: It can be determined by observing the pressure differential indicator of the water filter or based on usage time and water quality.
Answer: The discharge capacity ranges from [A] to [B] m³/min.
A. Oil injection air compressor B. Oil-free air compressor C. Both can be D. The answer cannot be determined: B Analysis: The semiconductor manufacturing industry has extremely high requirements for the purity of compressed air, so oil-free air compressors are usually chosen.
A. Small market share B. Few product types C. Insufficient technological innovation D. Large market share and rich product categories Answer: D. Large market share and rich product variety