Slogan of inspection and measurement center

It's a certificate. This can be posted by yourself, and the content is subject to the test certificate. Certificates can be bought by yourself, and some measurement and testing units sell them. If you need a small quantity, you can ask them directly. You should be talking about seals or seals. There are many types of compulsory verification, such as pressure gauges. Vernier calipers and micrometers seem to have never been seen before. Why do you need this?