Sentence:  These systems are often cheaper to install than conventional horizontal ducting and have the advantage over above-floor ducts that they are unlikely to be damaged by tractors unloading the <WSD>flat store</WSD>. 
Meaning of the word marked with <WSD> tags:  A crooked gambling establishment, such as a casino running rigged or fixed (dishonest) games of chance.<ref name="NDJ-def">'''“flat store”''', as which the primary '''“flat joint”''' is also known, listed [http://www.google.co.uk/books?id=3MM9AAAAIAAJ&pg=PA95&dq=%22flat+store%22&ei=0BhQR676NpOSiQHI5fySBw&sig=_KlfCQueuDH8mTP3RFT4Wlx1X2s on page 95] of '''Newspeak: A Dictionary of Jargon''' by Jonathon Green (1984; [http://www.routledge.com/ Routledge]; (0710096852) (10), (978-0710096852) (13))</ref>