评定产品的合格与否,须经检测后才能作出结论。结论的精确程度,取决于检测的方法与所采用的检测手段。当人为因素占主导地位时,这一结论的误差值往往是比较大的,要得到真实的结论,就得借助于各种各样的测试器具,使人为因素降到最低限度。由于我们行业的检测工作起步较晚,致使产品可检测项目十分有限,具体反映在检测手段比较少和虽订有测试项目,但某些测试方法还包含着很多 Assessment of product eligibility or not, subject to testing to be concluded. The accuracy of the conclusion depends on the method of detection and the means of detection used. When the human factor dominates, the error of this conclusion is often relatively large. To get the true conclusion, we must resort to a variety of testing instruments to minimize the human factor. Due to the late start of our industry testing, resulting in a very limited number of products detectable, specifically reflected in the detection means less and although there are test items, but some test methods also contain a lot of