凡制造在全国范围内从未生产过的计量器具新产品，必须经过定型鉴定。
The product design of a new measurement instrument, which has never been produced in the country, must be appraised before it can be manufactured.
凡制造在全国范围内从未生产过的计量器具新产品，必须经过定型鉴定。
The product design of a new measurement instrument, which has never been produced in the country, must be appraised before it can be manufactured.
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