11. :: That's certainly right, but not the most common case . 12. Another common case is pm or nm vs ? 13. One special but common case is ring; but their sizes must fulfil certain compatibility conditions. 14. A common case of the ABA problem is encountered when implementing a lock-free data structure. 15. In the most common case , the column contains one liquid stream and one gas stream. 16. Another common case is when a road and a railroad run parallel to each other. 17. In the common case , requirements cannot be fully defined at the beginning of the project. 18. The most common case is water softening consisting of removal of mercury, arsenic and many others. 19. This is just a common case of sniping and biting, and a mild one at that. 20. A more efficient tree construction algorithm for the common case of sparse data was outlined in.
