protecting slag的用法和樣例：
例句
- A device of measuring the crystallization temperature of mold slag based on single thermocouple wire was introdued.
筆者以保護渣結晶溫度為出發點，提出了一種將雙鉑銠熱電偶絲既作為加熱元件，又作測溫元件的熱絲法技術。 - The result of industrial application of new protecting slags indicated that they can greatly improve the quality of silicon steel.
生產應用表明，新型硅鋼保護渣對提高硅鋼高牌號比起到了積極的促進作用。
