Nauticam NA-GX7, Инструкция по эксплуатации

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6. Align the Port mounting indices of
the port and the housing.
7. Gently push the port into the port
opening of the housing, until it
cannot go in any further.
8. Lock the port into place by turning
the port locking lever to the inward
position. To ensure that the port is
securely mounted, confirm that the
green line on the safety button of
the port locking lever is visible.
9. To remove the port from the
housing, simply turn the port locking
lever to the outward position and
gently pull it out.