It can be downloaded from the homepage of the National Standardization Administration Committee. After opening the website, click the national standard full-text disclosure module, find the standard to download and follow the page prompts to complete the download. The specific operation method is as follows:

1. Open the above link on the computer or enter Baidu to enter the National Standardization Administration Committee, find its official website and click Enter.

2. After entering the National Standardization Administration Committee, click the national standard full-text disclosure button on the right to enter.

3. Click the corresponding standard in the national standard open interface.

4. Click on the standard to be downloaded in the national standard interface to enter.

5. Click the download standard button after the page jumps.

6. In the page that appears, click the PDF file on the right.

7. Click the download button in the pop-up standard download dialog box.

8. Wait for the file to download, and double-click to open the file.

9. After the page jumps, you can see that the corresponding national standard file has been downloaded in the computer, and you can view the specific content.