单项选择题
A.500KPa B.600KPa C.700KPa D.800KPa
A.10m～12m B.12m～14m C.12m～16m D.12m～18m
A.121mm±2mm B.122mm±2mm C.123mm±2mm D.124mm±2mm
A.±3V B.±4V C.±5V D.±6V
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