A. semiconductor manufacturing
B. food production
C. building construction
D. pharmaceutical industry
Answer: C
Analysis: Due to the high oil content of compressed air, oil-injected air compressors are usually used in occasions where the purity of compressed air is not high, such as construction.
A. Spraying and sandblasting operations B. Home use of C. Commercial places use D. Agricultural production uses answer: A. Spraying and sandblasting operations
A. Cylinder head and air liner B. Piston and piston rod C. Valve assemblies and lubrication systems D. These are all answers: D. all of the above are
A. A few hundred yuan to several thousand yuan B. Thousands of yuan to tens of thousands of yuan C. Tens of thousands to hundreds of thousands of yuan D. Hundreds of thousands of yuan to several million yuan Answer: B. Thousands to tens of thousands of yuan
A. 1 bar, 20℃, 0% humidity B. 1 atm, 25℃, 50% humidity C. 1.5 bar, 30℃, 30% humidity D. 1.2 bar, 15℃,…
A. B. major cities in the world Home use, commercial use C. Oil and gas, construction, logistics D. Manufacturing, oil and gas, construction Answer: A. major cities around the world