欧美成人高清在线观看_最近中文字幕免费Mⅴ在线视频_中文字幕丰满乱子无码视频_色黄大色黄女片免费看软件_亚洲日本国产乱码v_蜜芽一区二区三区国产精品_邪恶道acg邪恶集邪恶木_1v3三个男的是兄弟双男主_豆豆影院在线观看_日韩精品福利片午夜免费

In 2003, the development of anti jamming electric three-way baffle obtained a national utility model patent;
In 2009, the development of an atomization dust removal device was granted a national patent;
In 2010, the development of a slanted horizontal baffle material regulator obtained a national utility model patent;
In 2011, a replacement device for conveyor belts was developed and obtained a national utility model patent;
In 2011, a material regulator was developed and obtained a national utility model patent;
In 2014, the development of an integrated coal conveying system for atomization and dust removal was granted a national utility model patent;
In 2014, a national utility model patent was obtained for the development of an automatic lifting atomization dust removal device;
In 2015, the development of the coal bunker door structure for ship unloaders was granted a national utility model patent;
In 2016, the development of a soft dustproof and anti-collision door for ship unloaders was granted a national utility model patent;
In 2017, a coal powder conveyor belt cleaning device was developed and obtained a national utility model patent;
In 2017, the development of a diversion tee was granted a national utility model patent;
In 2017, a coal containing wastewater filtration and recovery device was developed and obtained a national utility model patent;
In 2018, a conveyor belt anti tearing device was developed and obtained a national utility model patent;
In 2018, a coal powder conveyor belt cleaning device was developed and obtained a national invention patent;
In 2018, a coal containing wastewater filtration and recovery device and filtration and recovery method were developed and obtained a national invention patent;
In 2019, the anti blocking monitoring device for material transportation pipelines was developed and obtained a national utility model patent;
In 2020, a belt conveyor guide groove was developed and obtained a national utility model patent;
In 2020, a belt correction device was developed and obtained a national utility model patent;
In 2022, a vertical lifting anti scattering and environmentally friendly coal plow was developed and obtained a national utility model patent (the invention patent is under review);
In 2022, a replacement device for conveyor belts was developed and obtained a national utility model patent;
In 2022, a support roller for mining dock conveyor was developed and obtained a national utility model patent;
In 2022, a drum end face automatic welding device was developed and obtained a national utility model patent;
In 2022, a national utility model patent was obtained for the development of an electric drainage device;
In 2023, a specialized collection device for dock tailings was developed and obtained a national utility model patent.