Service components in auto

Name	Description
$injector	`$injector` is used to retrieve object instances as defined by provider, instantiate types, invoke methods, and load modules.
$provide	The $provide service has a number of methods for registering components with the $injector. Many of these functions are also exposed on `angular.Module`.

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https://code.angularjs.org/1.3.20/docs/api/auto/service