Qhov no square (flat) hauv qab zipper hnab ua tshuab, synchronization nrog nruj tswj qhov system, uas muaj PLC pib tuning, khiav thiab tswj nyob rau hauv ntau yam logic thiab txhaum kev kuaj mob, uas yog ib tug zoo tagnrho khoom rau zipper square hauv qab hnab ntau lawm, los ntawm substrates xws li yas / yas, ntawv / yas, ntawv / ntawv laminated khoom