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Chongqing's engineering blasting technician certificate, whether to apply directly or to train first, when to organize the training?
You need to train first, and then take the exam after training.

20 10 Chongqing's training is over, with a total of four sessions. As for when to train on 20 1 1, you can go to the website of Chongqing Engineering Blasting Association and keep an eye on the trend at any time. I wish you success!