Core Viewpoint - The successful installation of the first large equipment, the propylene tower, marks the commencement of major equipment installation for the coal deep processing project in Yulin, indicating significant progress in the project timeline [1] Group 1: Project Details - The propylene tower has a diameter of over 6 meters, a height of over 60 meters, and a total weight of more than 460 tons, making it a core component of the olefin separation device [1] - The installation utilized a 4000-ton crawler crane for the main lift and a 400-ton crawler crane for assistance, ensuring precise execution of lifting, rotating, and positioning [1] Group 2: Safety and Coordination - Prior to the lifting operation, a joint inspection was conducted by the owner, supervisor, and general contractor to identify potential hazards [1] - All personnel involved in the operation received safety technical briefings to clarify technical challenges and safety risks, ensuring a zero-hazard work environment [1] Group 3: Project Significance - The successful installation of the propylene tower is considered a significant milestone in the construction of the project, highlighting the project's advancement [1]