A. General B. Poor C. Better D. Very good answer: D. very good
Answer: It alerts the operator with visual and audible warnings, and provides diagnostic information to help identify the problem.
A. Adopt energy-efficient design B. Increase noise C. Reduce power D. Reduce maintenance Answer: A. Adopt energy-efficient design
Answer: It uses water as a lubricant, achieving oil-free operation.
A. Large flow and high power are conducive to energy conservation B. Compact structure and good sealing effect C. Smooth operation and reliable operation D. These are all answers: D. all of the above are