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What third-party units are there for weak current project acceptance?

Third-party units for weak current project acceptance include Shandong Zhuo Lang Testing Consulting Co., Ltd. and Jianbiao Testing Technology Co., Ltd. ... Shandong Zhuo Lang Testing Consulting Co., Ltd. and Jianbiao Testing Technology Co., Ltd. are professional service-oriented inspection and testing institutions registered by the State Administration for Industry and Commerce and approved by the State Bureau of Quality and Technical Supervision, and are third-party units specializing in building intelligent testing, weak current engineering testing and security engineering testing.