[Picture of the Day] 2016 06 24 What is the equipment in this picture?

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[Picture of the Day] 2016 06 24 The wonderful picture of the day continues. What is the equipment in this picture? Reciprocating compressor cylinder petrochemical activity promotion: Notice on the launch of the large-scale activity "I'm saving energy, where are you" in the Petrochemical District http://bbs.hcbbs.com/thread-1579199-1-1.html This event has two awards: text and picture. When the participating themes exceed 200, a special prize of 600 Haichuan coins will be added for one person (the special prize for more than 300 themes will be increased to 1000 Haichuan coins for 500 themes and 1500 Haichuan coins). First prize: 3 second prizes for Haichuan Memorial Water Cup: 120 Haichuan coins will be awarded to each of the 5 winners.: Several people will be rewarded with 200 wealth each. 1. Regarding the collection of posts for subdivided sections with prizes http://bbs.hcbbs.com/thread-1568416-1-1.html (Source: Haichuan Chemical Forum) 2. [Petrochemical Weekly] 2016-3-12 Issue 9 (Summary of recent petrochemical activities) http://bbs.hcbbs.com/thread-1568615-1-1.html (Source: Haichuan Chemical Forum) 3. "Ocean Thanksgiving Season" [Petrochemical Zone] Sub-event Activity Summary Office http://bbs.hcbbs.com/thread-1533218-1-1.html ocean, picture, petrochemical