A.0.01%～0.05% B.0.05%～0.1% C.0.1%～0.5% D.4%～6%
A.竖 B.斜 C.横 D.立
A.50 B.40 C.30 D.20
A.5 B.6 C.8 D.10
A.110 B.70 C.60 D.80
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