【Daily Question No. 42】April 9, 2017

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Propylene is a gas with a hydrocarbon-like odor; its explosion limit is (), and it is classified as a material posing a fire hazard of category A. Correct answer: 2-11%. Petrochemical sector – an event aimed at generating new ideas for energy savings, featuring creative approaches (sponsors are being sought; the highest returns ever available). http://bbs.hcbbs.com/thread-1666758-1-1.html. Sponsors are being sought for this event; those interested can contact the event organizer. The Petrochemical Deep Processing section – an event to share pictures of chemical processing equipment has now started! A vast amount of wealth, as well as HaiChuan coins, are waiting for you to claim them: http://bbs.hcbbs.com/thread-1760733-1-1.html. There’s also a notice regarding the collection of chemical industry-related technical materials in the “Petroleum and Chemicals Section”: http://bbs.hcbbs.com/thread-1614796-1-1.html. Additionally, you can find this image here: http://bbs.hcbbs.com/hcdown/data/attachment/forum/201704/07/123053embbjkok61hz6vvz.jpg.thumb.jpg. [HaiXin Chemical Cup ★ Spring has arrived for HaiChuan Chemicals] – A compilation of posts related to the 2017 scenery-sharing event; you can take a look at the local landscapes posted by users from various places in your free time: http://bbs.hcbbs.com/thread-1766484-1-1.html