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- Posts: 12
- Joined: Tue Jul 23, 2013 4:50 pm
I would appreciate your input on this:
I need to know how to identify a compatible guard-column with a column. Any recommendations?
In specific for a SEC column 30cmx7.8mm which pre-column would be compatible: a 6.0x40mm or a 7.5cmx7.5mm (or both?)
Thank you in advance