Delfin D/G 1 Z22 Operating And Maintenance Manual page 37

Caution!
All maintenance operations must be executed in NON-CLASSIFIED
atmosphere, which means in a non-explosive atmosphere area.
WARNING!
The vacuum's extraordinary maintenance shall only be executed by the
manufacturer's technical engineers.
D/G 1 – D/G 2 Z22 Edition: September 2005 – Rel. 00
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