单项选择题
A.50 B.40 C.35 D.25
A.35W470 B.50W1300 C.65W800 D.65W1600
A.750~1300mm B.0.35~0.65mm C.800~1300mm D.750~1200mm
A.0.35mm B.0.50mm C.0.65mm D.0.80mm
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