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nh4 2 tio c2o4 2 ·h2o
nh4 2 ni c2o4 2 h2o 2
nh4 2tio c2o4 2
nh4 2 vo 2 c2o4 3
nh4 2 b4o5 oh 4 h2o 2
nh4 2c2o4·h2o
nh4 2c2o4.h2o
nh4 2 v h2o 6 so4 2
tio2 + nh4hf2
nh4 2co3 + ca oh 2
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