A. 50 B. 100 C. 500 D. 1000
A. 散水 B. 台阶 C. 踢脚板 D. 勒脚
A. 误差 B. 低精度 C. 一般 D. 其他
A. overheated compressor bearings B. excess lube oil viscosity C. carbon deposits on the compressor piston rings D. wax crystals forming in the lubricant