Question 2: mechanical vise, content substation lighting systems, wiring connected to these courses is to develop technology and by whom, who will check the development meets the standard requirements?
Question 2: Mechanical tiger pliers, substation lighting systems, connection and wiring technology, who developed the content slots, who will be developed in accordance with the standard requirements?
Question 2: who develops the mechanical vise, substation lighting system, connection and wiring technology, and who checks whether they meet the standard requirements?<br>