| 摘要 |
FIELD: construction. ^ SUBSTANCE: glasing contains the following components, wt parts: quartz sand 57.5-60.5; potash 15-17; soda 10-12; cobalt oxide 0.4-0.6; copper oxide 0.9-2.1; cryolite 10-14. ^ EFFECT: production of environmentally safe glasing. ^ 1 tbl |
