The dephosphorizing agent containing 20 percent LD slag was optimized by the powder injection experiments in laboratory, the dephosphorization ratio reached 70 percent.
经过实验室铁水喷粉脱磷试验，筛选优化出含20％转炉渣的脱磷剂，脱磷率达70％。
The more common Lethal Dosage (LD) tests are used to determine the amount of a substance that will kill a predetermined ratio of animals.
通常的致死剂量测试(LD)被用来确定能够一次杀死动物的几率。
The more common Lethal Dosage (LD) tests are used to determine the amount of a substance that will kill a predetermined ratio of animals.
通常的致死剂量测试(LD)被用来确定能够一次杀死动物的几率。
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