R&D center Citymax Plant Physiology Laboratory 01 Citymax Tuam Tshoj R & D Center 02 ib Citymax Plant Physiology Laboratory 03 Kev Tswj Xyuas Zoo Kjeldahl nitrogen analyzer 01 Atomic absorption spectrophotometer 02 ib Atomic fluorescence spectrophotometer 03 Ua kua chromatograph 04 ib Tsis Siv Neeg Potentiometric Titrator 05