Since I engaged in this professional work, I have served as the project leader and mainly participated in the completion of the projects: 1. Participate in the completion of patents: 2011.5 to 2013.2 Completed functional centralized operation differential pressure detection instrument connection device, obtained the invention patent certificate, ranked first; 2011.9 to 2013.7 Completed a centralized control device for fluid path switching, and obtained the invention patent certificate, ranking first; 2011.9 to 2013.6 Completed a centralized control device for gas flow switching, and obtained the invention patent certificate, ranking first; 2011.9 to 2013.1 Completed a centralized control device for gas channel switching and flow conversion, and obtained the invention patent certificate, ranking first. Utility model patent: 2017.12 to 2018.6 a lightning-proof pneumatic pressure transmitter assembly, ranking first; 2017.12 to 2018.12 completed a lightning-proof pressure sensor assembly, ranking first; From December 2020.to October 2021.10, a clamping structure and suspension sealing structure for gas meter detection device were completed, ranking first; From 2021.5 to 2022.1, a wet gas flowmeter with high measurement accuracy was completed, ranking first; From 2021.5 to 2022.9, a metering drum rotation mechanism was completed, ranking first; 2021.5 to 2022.6 completion of a measurement indicating mechanism, ranking first; From 2021.7 to 2021.12, a gas meter automatic detection