【Picture of the Day Question 078】March 19, 2018

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【Daily Image Question No. 078】What is the item in the picture dated 2018.03.19? Tip: Impact drills and electric drills are very useful tools. For management purposes, dust covers for impact drills and electric drills are used; to view content from a few days ago, please go to the summary post below. 2018 Chemical Engineering Technology Training – Daily Question Summary Thread: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888971
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2018 LNG Technology Discussion Section – Daily Question Summary Thread: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888973
2017 Q&A Summary Thread (updates have started): https://bbs.hcbbs.com/thread-1657793-1-1.html
2017 Daily Question Summary Thread (updates have started): https://bbs.hcbbs.com/thread-1657794-1-1.html
2017 Daily Image Summary Thread: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160
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2016 Q&A Summary Thread (all updates completed): https://bbs.hcbbs.com/thread-1597792-1-1.html