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@rightfold
Last active August 29, 2015 14:10
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+----------+
| pumpjack |-------------------+ +----------------+
+----------+ +----------+ | +--------------+ +---------| chemical plant | (plastic)
| pumpjack |---+---| oil refinery | | +----------------+
+----------+ | +--------------+ +------+
| | | +--------| tank | <- petro gas
+----------+ | | | +------+ +----------------+
| pumpjack |---------------+ | | +------+ +------------------| chemical plant | (battery)
+----------+ | +---| tank | <- heavy oil +----------------+
| +------+
+------+
| tank | <- light oil
+------+
| +----------------+
+---------| chemical plant | (lube)
+----------------+
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