The national standard "GB/T 7157-2019" which was formulated under the leading role of YIHUA came into effect.
The drafting unit of the national standard of electric soldering iron and hot air rework station in China, and the national standard "GB/T 7157-2019" participated in the formulation was released on August 30, 2019, and officially implemented on March 1, 2020;
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