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Ordinary Grade high-B

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Ordinary Grade high-B

Description：

1、SPEC: B:21-23 AL<0.5 SI<1.5 P<0.05 C<0.5 S<0.01
SIZE: LUMP AND POWDER 2、SPEC: B:19-21 AL<0.5 SI<1.5 P<0.05 C<0.5 S<0.01
SIZE: LUMP AND POWDER

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