The semiconductor lighting industry is expected to end the blank history of professional and technical qualifications. Recently, the National Semiconductor Lighting Engineering R&D and Industry Alliance (CSA) organized the industry's senior experts to discuss "Semiconductor Lighting Engineer Review Conditions" (discussion draft) and "Semiconductor Lighting Engineer Professional Technology Qualification Management Measures" (Trial) in Dongguan. The management system of semiconductor lighting engineers led by the Ministry of Human Resources and Social Security and the National Semiconductor Lighting Engineering R&D and Industry Alliance (CSA) has surfaced.
In 2003, the country started the semiconductor lighting project, but today, there is no semiconductor lighting professional technical qualification or technical title evaluation in this industry, this phenomenon is about to become history. The semiconductor lighting engineer professional technical qualifications to be developed for the national technicians in the field of semiconductor lighting will be divided into assistant engineers, engineers and senior engineers. The certification procedures include application acceptance, preliminary examination, written examination, interview, publicity, approval and certification.
On the same day, the National Association of Coalitions (CSA) Dongguan seminar experts revealed that the National Alliance (CSA) undertakes the pilot work of semiconductor lighting engineer professional technical qualification certification, and accepts the leadership of the Ministry of Human Resources and Social Security Vocational Skills Identification Center and the relevant government departments. The certification adheres to the principle of voluntary application and effect recognition, adheres to the principles of openness, fairness and impartiality, accepts applications for scientific and technical personnel in the field of semiconductor lighting in the country, implements registration management for technical personnel who have obtained technical qualifications, and issues corresponding professional and technical qualification certificates.
According to the certification management structure of semiconductor lighting engineers, the establishment of the Semiconductor Lighting Engineer Professional Technical Qualification Steering Committee, as the highest leading body of certification, under the Steering Committee, set up a semiconductor lighting engineer professional technical qualification review working group, certification examination working group, The certification training working group also sets up the semiconductor lighting engineer professional technical qualification certification management office to undertake the daily work of certification, coordinate the evaluation working group, the examination working group and the training working group.
It is reported that semiconductor lighting engineers are expected to review a batch before the end of 2012.

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Heat exchanger components include plate heat exchangers, air heat exchangers, and shell-and-tube heat exchangers. Frequently replaced parts include plates and rubber pads of plate heat exchangers, finned tubes of air heat exchangers, condensing coils, seamless steel pipes, U-shaped tubes, tube sheets and flanges of shell-and-tube heat exchangers, etc. In the following, we will further display each component and its characteristics and uses.

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