真兰仪表：深圳燃气集团是公司的重要客户之一

Group 1 - The core viewpoint of the article is that Zhenlan Instrument (301303) emphasizes its ongoing collaboration with Shenzhen Gas Group (601139), highlighting the importance of this client relationship [1] - Zhenlan Instrument primarily supplies gas meters, flow meters, and related accessories to Shenzhen Gas Group, indicating a focused product offering in the gas industry [1] - The company expresses commitment to maintaining a good partnership with Shenzhen Gas Group, suggesting a strategic approach to client relations in the gas sector [1]