A projector (also known as a projector) is also known as a "writing projector". A projection optical instrument that provides a large scale image. On the basis of the direct projector, an additional reflector is added to change the light path, so that the image of the projection plate placed flat on the carrier glass is projected onto the screen. Due to its large condenser (usually using a Fresnel lens), it can be used to project various large-sized projection single films or rolls made in advance or written on site, as well as projection teaching aids made of transparent materials. Compared with slides, it has the following characteristics: it can be written directly on the projection film to replace the blackboard; Short distance from the screen, but able to produce large and bright images; No need for tight shading during use; Projection aids can be used for demonstration experiments. Generally, it can be divided into
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China