...过测定标准参考物质（SRM）,以及参加国际临床化学与检验医学联合会（IFCC）主办的参考实验室间的国际环形比对试验（ring-trial），来验证参考方法的准确性；按照美国临床和实验室标准委员会（CLSI）EP9-A2试验方案，己糖激酶参考方法作为比对方法，5种临床常用...
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Ring Trial 环形比对试验
international collaborative ring trial 国际协同验证
At present, the technical parameters and the wear rate of the retaining ring are confirmed through trial or experience, which usually has longer periods, higher cost and larger waste.
目前关于保持环工艺参数和磨损率的确定都是依靠反复的试验或经验确定，周期长，成本高，浪费大。
youdao
The alleged head of a multi-billion dollar smuggling ring in south-east China has confessed and now faces trial, Chinese state media say.
BBC: China
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