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I saw the news that a high-rise building caught fire this afternoon. This is a warning to everyone. How can this happen? Don't they all have anti-leakage alarm devices now? You can check the listed companies that do testing instruments, and their demand will also rise in the future. Market share is also increasing. The performance will be guaranteed.The strong pressure is around 3480;Preface:

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The support level is around 2250.Science and technology-new quality generation, new energy, military industry, special evaluation, big finance, medicine and medical care, should be good.The strong pressure is around 3480;