Scorrevole esterno muro — Sistema Classic 179 178 M AN H AT TAN L I N E M AN H AT TAN L I N E S C O R R E VO L E E ST E R N O M U RO S I ST E M A C L AS S I C E X TE RN A L WA L L SLI DI NG DO O R C L AS S IC SYSTE M MA N HAT TA N L IN E LI NE A MAN HAT TA N