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الشخص الذي يمكن الاتصال به Ms. Wang
ETDZ, Qinhuangdao, Hebei
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Na2 B4O7ï¼…
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≥*5
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*5.6
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Na2Oï¼…
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≥ *0
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*1.7
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B2O3 ï¼…
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≥ *8
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*8.6
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Ai2O3 %
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≤
0.**5
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0.**3
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Fe %
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≤0.**3
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0.**3
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H2O %
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≤0.5
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0.*6
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