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at time 4:57 one of the complete row of photomultiplier tube was done by Picker 600 and 12OO scanners
At time 5:50 the E beam was made by Imatron
at time 4:57 one of the complete row of photomultiplier tube was done by Picker 600 and 12OO scanners
At time 5:50 the E beam was made by Imatron