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2708100000
沥青 PETROLEUM PITCH ZL 250M
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沥青 PITCHES H-101
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沥青 PITCHES KR-2
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沥青 PITCHES H-101
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沥青 PITCHES KR-2
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沥青/涂抹在镜片上,保护镜片研磨不受损伤
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沥青PETROLEUM PITCH ZL 250M
2708100000
沥青棒 RW-99 NO.11C
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沥青生产耐火砖的原料起结合剂作用
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沥青(生产耐火砖的原料起结合剂作用)
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球状沥青 GLOBULAR PITCH
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预焙阳极用沥青标样从煤焦油中提取