中文字幕日韩欧美一区二区三区_欧洲一级毛片_亚洲国产精品视频_亚洲视频三区_龙珠z国语291集普通话_久久久精品456亚洲影院

How to renew the explosion-proof certificate after it expires?

What is the validity period of the domestic explosion-proof certificate? End users of explosion-proof electrical products often face such problems. In fact, the explosion-proof certificate has a validity period. Currently, the validity period of domestic explosion-proof certificates is generally 5 years. Each certifica……

Domestic explosion-proof certification agencies

Type I (coal mine) issuing agency: National Mining Product Safety Mark Center: A、 Administrative division: Under the jurisdiction of the State Administration of Work Safety. B、 Job responsibilities: Undertake all work related to the management of safety signs for mining products, including certification, technical revi……

Why choose tempered glass for explosion-proof transparent parts?

Why choose tempered glass for explosion-proof transparent parts? Transparent parts are a very important material for explosion-proof electrical equipment. When choosing transparent parts, customers always ask what material to use? Can glass be used? Can plastic be used? Below, Zhongnuo Testing will explain to everyone.……

There are several types of explosion-proof certification

Explosion proof certification is the process of determining whether equipment meets the requirements of explosion-proof standards, conducting type tests and routine tests for adaptation, and issuing relevant certificates of conformity. The certificate can be for Ex devices or Ex components. Equipment and protective sys……

Mechanical Industry Explosion proof Electrical Equipment Quality Supervision and Testing Center

Jiamusi Explosion proof Motor Research Institute Co., Ltd., the National Quality Supervision and Inspection Center for Lifting Metallurgy and Explosion proof Motors, and the Quality Supervision and Testing Center for Explosion proof Electrical Equipment in the Machinery Industry, are laboratories recognized by the Chin……

What do MA certification and KA certification mean?

MA: Representing Mei An as the supervisor and issuing unit: Safety Standard National Mining Product Safety Mark; Location of use: Underground coal mine KA: Representing Kuang An Supervisor and Issuing Unit: Mining Product Safety Mark Office Location of use: Non coal mine. In addition, KY is the general type used for mi……

How much does it cost to obtain explosion-proof certification?

The cost of explosion-proof certification is related to the following aspects: 1. Do you need to obtain an explosion-proof certificate or an explosion-proof 3C certification? If the explosion-proof 3C certification is required, a factory audit is required, which includes audit fees, travel expenses for the inspection a……

Is there an explosion-proof certification agency in China?

Is there an explosion-proof certification agency in China? In recent years, with the increasingly strict supervision of explosion-proof electrical products by the country, electrical products applied to various hazardous and explosive locations must obtain explosion-proof certificates issued by third-party organization……

What qualifications are required for explosion-proof construction

What qualifications are required for explosion-proof construction? Of course, it is necessary to have the qualification for repairing explosion-proof electrical equipment, which should actually be called the "Qualification for Installation and Repair of Explosion proof Electrical Equipment". Explosion proof e……

What kind of certification does MA certification belong to

What certification does MA certification belong to? MA is the coal safety mark, and MA certification is also known as coal safety certification (Mei An). It is applicable to various equipment and products used underground in coal mines and is a mandatory certification. The National Safety Standards Center is responsibl……