highly interesting! thanks!
Hm, I should introduce these items in my “living in the city course”…
(it is a pity, but i cannot post photos from the industrial plants in question)
You’re welcome 
rendering problem again:
安置 is the correct alternative
but the new HSK 500 shows the second character in a different manner (http://www.memrise.com/course/31954/new-hsk-5000/1/)
@joshua, are there special problems on memrise with the correct display of some chinese pictograms?