双层玻璃 : 进一步改善中空玻璃的保温性能 Dependable —-Gas filling ——–Technology …keeping gas filling easy no modem communication needed no external calibration needed no paperwork or print-out needed no valve- or sensor-monitoring no technicians/engineers needed …just gas filling easy push-button operation self explaining setup and installation unskilled workers can do the job DGT Anlagen und Systeme GmbH2018-10-02T14:12:04+02:00