Ligne 1 : | Ligne 1 : | ||
− | Use a plastic scraper to smooth out the edges of the border. | + | * Use a plastic scraper to smooth out the edges of the border. |
− | Mark each filter with a date, serial number and manufacturer's name using a metal "stamp". A database can then be used for filter tracking | + | * Mark each filter with a date, serial number and manufacturer's name using a metal "stamp". A database can then be used for filter tracking |
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