The Nation's Schools, Količina 81Michael Vincent O'Shea McGraw Hill, 1968 |
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Zadetki 1–3 od 75
Stran 105
... door is under control at all times with Norton Uni - Trol . This combination door closer / door holder performs all five door control functions : 1 ) cushions the opening of the door . 2 ) stops the door at full open . 3 ) holds the ...
... door is under control at all times with Norton Uni - Trol . This combination door closer / door holder performs all five door control functions : 1 ) cushions the opening of the door . 2 ) stops the door at full open . 3 ) holds the ...
Stran 58
... door control . A combination door closer- door holder that handles the roughest toughest traffic , with safety for students and protection for the door . When traffic is light , it's a door closer . When traffic is heavy , you can ...
... door control . A combination door closer- door holder that handles the roughest toughest traffic , with safety for students and protection for the door . When traffic is light , it's a door closer . When traffic is heavy , you can ...
Stran 80
... doors are opened and closed continuously . So , we made the Yale # 80 series door closer with a full rack and pinion mechanism for continuous checking action . And we know a violently opened wall , door , and closer arm . So we made our ...
... doors are opened and closed continuously . So , we made the Yale # 80 series door closer with a full rack and pinion mechanism for continuous checking action . And we know a violently opened wall , door , and closer arm . So we made our ...
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