Highlights of the competition

All live broadcast signals on this website are collected by users or searched and sorted out from search engines, all content is derived from the Internet, this website itself does not provide any live broadcast signals and video content (submission email: 3599644023@qq.com), this website cannot ensure that all of them are true and legal. Some content may contain false information, misleading remarks or violations of laws and regulations, public order and good customs, please screen by yourself, due to the consequences caused by the use of false content, this website is not responsible, if there is any infringement, please contact us to delete, thank you!

在线通过压力，钢球直径以及压痕直径来计算布氏硬度