The incorporation of air bubbles in the glass spoiled it.
玻璃含有气
, 使它质量降低。
;砂眼The incorporation of air bubbles in the glass spoiled it.
玻璃含有气
, 使它质量降低。
The surface defect appeared mainly as air bubbles and ferroferric oxide drops which centred around the lower outer - field portion of the stoneware cup.
表观缺陷主要表现为

氧化铁
粒,且其

杯体下部外侧面。
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