| 摘要 |
Glass for covering electrodes, which consists essentially of, as represented by mol % based on the following oxides, from 25 to 60% of B2O3, from 0 to 18% of SiO2, from 0 to 60% of ZnO, from 0 to 18% of BaO, from 3 to 15% of Bi2O3 and from 0 to 10% of Al2O3, and contains no PbO.
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