单项选择题
A.1020 B.1300 C.1500 D.1650
A.1150 B.1100 C.1050 D.1075
A.进气0.43±10mm排气0.48±0.05mm B.进气0.45±0.05mm排气0.48±0.05mm C.进气0.5±0.05mm排气0.5±0.05mm D.进气0.43±0.05mm排气0.48±0.05mm
A.润滑 B.导热 C.清洗 D.缓冲
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