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do you know the disk?

storages

New Member
Joined
Feb 15, 2010
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3
Location
Beijing of China
Do you know the disk, please tell me or give me some information about it. thanks
11111.jpg
 

Chuck(G)

25k Member
Joined
Jan 11, 2007
Messages
43,978
Location
Pacific Northwest, USA
I wonder if these aren't meant for a dictation machine or typewriter. The exposed media implies that the recording density could not have been very high.
 
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