【Picture of the Day】 2016 06 27 What is the device in this picture?

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【Picture of the Day】June 27, 2016 – Picture of the Day: More great content. What is the device in this picture? Compressor air valves – Promotion activities in the petrochemical industry: Notice regarding the “I’m saving energy; where are you?” event in the petrochemical area. http://bbs.hcbbs.com/thread-1579199-1-1.html This event offers awards in both textual and photographic categories. When there are over 200 entries, an additional grand prize will be awarded, worth 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 themed posts with prizes: 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 industry events): 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)