我们公司的烟感探测器，是公司经多年研究，反复试验后定型生产的一种专用工具。
Our company's haze meter, is the company through years of study and repeated tests of a specialized tool for shaping the production.
在全国范围内已经定型，而本单位未生产过的计量器具新产品，应当进行样机试验。
New products whose designs have been finalized in the country But have never been produced by the producer must be tested and their prototypes be made.
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