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luckclover:BK7材料SCHOTT玻璃牌号 ;]c:0W' 折射率 1.51680 O~udlVn<6 耐酸性 1 |mS-<e8LY4 K氏硬度 610 (2013-01-09 09:53) CW+] Jv]"
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