单项选择题
A.10~15m/s B.3.0~5m/s C.1.0~1.5m/s D.0.15~0.2m/s
A.30~50t B.50~100t C.10~20t D.1~10t
A.250um B.177um C.800um D.100um
A.冲压式制粒机 B.型压式制粒机 C.环模制粒机 D.平模制粒机
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