In this lesson, Schlage mechanical trainer Gordon Malczewski teaches the basics of master keying.
For more information, or more Listen-In Video Lessons, please visit our web site at [ Ссылка ]
![](https://i.ytimg.com/vi/zDkjw15SCZ0/maxresdefault.jpg)
In this lesson, Schlage mechanical trainer Gordon Malczewski teaches the basics of master keying.
For more information, or more Listen-In Video Lessons, please visit our web site at [ Ссылка ]