How to clear the duplicates in the "Open with" Mac OS x file

In Mac OS x, when we select a file that wants to open the file in some way, you can choose right-open, which prompts you for the software that might be available to open the file. But sometimes, this "open the Way" list will appear a lot of duplicates, and this problem is now very common, want to solve this problem is very simple, only a section of Terminal command, to rebuild the list can be:

Open OS X's "Terminal" program (available with Spotlight search), copy and paste the command to the terminal, and return:

/system/library/frameworks/coreservices.framework/versions/

A/frameworks/launchservices.framework/versions/a/support/lsregister-kill-r-domain Local-domain User;killall Finder;echo "Open with has been rebuilt, Finder would relaunch"

So when you right-click on the "open mode" again, there's not a lot of duplicate items: