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0
61897
0
120
block

Which part normally works in pairs?

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61898
0
120
none
61899
0
180
none
61900
0
120
none
61901
0
120
none
61902
0
180
none
61903
0
120
none
61904
0
120
none
61905
0
120
none
61906
0
120
none