msingi
Vifaa na mita
Sampuli ya isotope ya USGS, USGS25,Ammonium Sulfate
Mifano ya isotope, IAEA-N-1, Ammonium sulfate, IAEA mfano
IAEA-NO3, Potassium Nitrate, IAEA 标样
Operesheni ya mafanikio!