单项选择题
A.110V B.220V C.380V D.480V
A.0.1~0.3Mpa B.0.3~0.5Mpa C.0.5~0.8Mpa D.0.4~0.9Mpa
A.1078±8g B.1087±8g C.1078±9g D.1087±9g
A.170±5℃ B.175±5℃ C.180±5℃ D.185±5℃
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