1st chemistry

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0
577619
0
90
block

What do the numbers in column B refer

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577620
0
90
none
577621
0
90
none
577622
0
90
none
577623
0
90
none
577624
0
90
none
577625
0
90
none
577626
0
90
none
577010
0
90
none
577011
0
90
none
577012
0
90
none
577013
0
90
none
577014
0
90
none