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beijing jiarui deyi environmental protection technology co., ltd. M handbrake clutch hoist M technological innovation M hefei tianhai testing technology service co., ltd. M how to join M beijing jiarui deyi environmental protection technology co., ltd. specializes in the management of sound insulation and noise reduction projects, noise management, noise reduction treatment, sound insulation treatment, cooling tower noise management, air conditioning noise management, air conditioning noise management, central air conditioning noise management, fan noise management, computer room noise management, pump noise management, sound insulation wall, sound insulation door, industrial noise management, workshop noise management and other types of vibration noise management. /3M hanks sound insulation has been engaged in noise control for 26 years, and the company has been 5,600 M hefei tianhai testing technology service co., ltd. was established in november 2018. it is a third-party fair testing institution with independent legal person qualifications. in june 2019, hefei tianhai testing technology service co., ltd. passed the review of the anhui provincial market supervision administration and obtained the qualification certification certificate for inspection and testing institutions. the testing projects that can be carried out include: 10 public places, 35 domestic drinking water, 55 ambient air and waste gas, 12 indoor air, 85 water (including atmospheric precipitation) and wastewater, 37 soil and sediments, 29 solid waste, and 3 noise, a total of 8 major categories and 266 items. M traceable network system M tag design software

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