东华测试：公司产品广泛应用于国防工业、航空航天等国家重点发展行业和领域

Group 1 - The company, Donghua Testing (300354), has indicated that its products are widely used in key national development industries and fields [1] - The applications of the company's products include defense industry, aerospace, civil engineering, engineering machinery, rail transportation, and shipping [1]