单项选择题
A.500m2B.1000m2C.2000m2D.4000m2
A.BGFM4022-15B.BFM4022-15C.BGFM4022-30D.BHFM4022-15
A.100mmB.120mm C.200mmD.150mm
A.100mmB.250mmC.150~200mm D.300mm
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