共 21 条
[1]
ALLARDICE DJ, 1977, 342 STAT EL COMM VIC
[4]
EXTRACTING METALS FROM AMMONIACAL SOLUTION WITH LOW RANK COALS
[J].
METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY,
1978, 9 (03)
:409-413
[5]
CULLEN GV, 1981, PROCESS FUNDAMENTAL, P371
[6]
CULLEN GV, 1973, Patent No. 491555
[7]
CULLEN GV, 1976, Patent No. 981593
[8]
CULLEN GV, 1972, Patent No. 1385957
[9]
HERMAN H, 1952, BROWN COAL, P4
[10]
LALANCETTE JM, 1974, Patent No. 3790370