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nh4 nbo c2o4 2 h2o 2 ·nh2o
nh4 2 ni c2o4 2 h2o 2
nh4 2 b4o5 oh 4 h2o 2
nh4 2 vo 2 c2o4 3
nh4 2tio c2o4 2
nh4 b5o6 oh 4 h2o 2
nh4 2c2o4.h2o
nh4 2c2o4·h2o
n2h4 • h2o
n2h4h2o
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