Group 1 - Hunan Sand Technology Co., Ltd. has obtained a patent for a "sample barrel transfer vehicle," with the patent announcement number CN223174016U and application date of July 2024 [1] - The patent describes a simple structure and operation of the transfer vehicle, which includes a cargo box with a reversible conveyor device and a flip door mechanism for transferring sample barrels [1] - The vehicle is powered by a battery component and controlled by an electronic control component, highlighting its low failure rate and operational efficiency [1] Group 2 - Hunan Sand Technology Co., Ltd. was established in 2004 and is located in Changsha, primarily engaged in the manufacturing of instruments and meters [2] - The company has a registered capital of 205.7545 million RMB and has made investments in four enterprises [2] - The company has participated in 2,890 bidding projects and holds 1,005 patents along with 70 trademark registrations [2]