单项选择题
A1/A2型题
B.1.0~1.5mm
C.1.6~1.9mm
D.2.0~2.5mm
E.2.6~3.0mm
形成空壳状的铸造壳体厚度一般为()
A.0.5~0.9mmB.1.0~1.5mm
C.1.6~1.9mm
D.2.0~2.5mm
E.2.6~3.0mm
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