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Survex File: caves-1623/107/envelope

No differences from last saved file.
underground survey length: 18.31 metres
parent survex file caves-1623/107/107.svx for this cave
survex directory [SvxDir:caves-1623/107]
block envelope has parent block 107
2013-07-26 ['envelope'] Survex files on this date:
    caves-1623/107/ext
    caves-1623/107/envelope
    caves-1623/107/sleepless
No wallets files found for this date.
Logbook trips on this date:
    Pushing the Envelope and Sleepless