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seltene Erden
chem.	lanthanide series; lanthanides
mining.	noble earths
opt.	rare earths
seltene Erde
chem.	rare earths
earth.sc., chem.	rare earth element; rare earth metal; rare earth
Seltene Erden
chem.	rare earths (Oxide der Seltenerdmetalle)
Seltene Erde
phys.	rare-earth element

seltene Erden: 16 phrases in 7 subjects

Chemistry	1
Earth sciences	7
General	1
Hobbies and pastimes	1
Mining	2
Nuclear physics	1
Physics	3