China Railway First Group Co., Ltd. Rail Transit Line 22 (Pinggu Line) Electromechanical Equipment Installation Engineering Contract Section 01 Self-Purchased Materials Tender Procurement (VRF Copper Tube) Tender Announcement

[Tender Notice] China Railway First Group Co., Ltd. Rail Transit Line 22 (Pinggu Line) Electromechanical Equipment Installation Engineering Contract Section 01 Self-Purchased Materials Tender Procurement (VRF Copper Tube) Tender Announcement Purchasing Unit: China Railway First Group Construction and Installation Engineering Co., Ltd. Region: Beilin District, Xi'an, Shaanxi Industry: Machinery & Equipment Project No.: ZTYJ-F-WZ-2026-077 Published: 2026-07-09 Document Deadline: 2026-07-19