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rails.
Tear off the binder fixing gasket and
then take out the gasket and binder.
gasket
5.
Step 2: Install upper guide rail
1.
upper guide rail
sponge
Tear off the paster at the back of sealing strip, and then align it at the bottom
edge of upper guide rail to stick the sealing strip at the bottom of upper guide
rail.
upper
rail
guide
lower guide rail