【Picture of the Day】2016 07 26 What is the device in this picture?

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【Picture of the Day】2016-07-26 Picture of the Day – The excitement continues. What is the device in this picture? Analysis of gas compressors or reciprocating compressors. Promotion of petrochemical-related activities: Notice regarding the large-scale event “I’m saving energy; where are you?” in the petrochemical area: http://bbs.hcbbs.com/thread-1579199-1-1.html. This event offers awards in both text and image categories. When there are over 200 entries, an additional grand prize will be awarded; the value of this prize is 600 Haichuan coins. If there are more than 300 entries, the grand prize value increases to 1,000 Haichuan coins, and if there are 500 entries, it rises to 1,500 Haichuan coins. First prize: 3 Haichuan commemorative water cups. Second prize: 5 winners, each receiving 120 Haichuan coins. Honorable mentions: several winners, each receiving 200 Haichuan coins. 1. Information on contests with prizes for specific topic categories: http://bbs.hcbbs.com/thread-1568416-1-1.html (Source: Haichuan Chemical Forum). 2. [Petrochemical Weekly] Issue No. 9, dated 2016-3-12 (Summary of recent petrochemical-related activities): http://bbs.hcbbs.com/thread-1568615-1-1.html (Source: Haichuan Chemical Forum). 3. “Haichuan Gratitude Season” – Summary of events in the Petrochemical Section: http://bbs.hcbbs.com/thread-1533218-1-1.html (Source: Haichuan Chemical Forum). 4. Summary of professional “basic knowledge” posts in the Petrochemical Section (Supported by the main forum; amazing prizes await you): http://bbs.hcbbs.com/thread-1557057-1-1.html (Source: Haichuan Chemical Forum)