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NN-OBEP due to Ueda, Riewe and Green is extended to ΛN and ΛΛsystems in the framework of the nonet mesons and SU(3) invariance. The date for Λp cross sections, hypertriton and the ΛΛ separation energies of ^6_<ΛΛ>He, ^<10>_<ΛΛ>Be, and ^<13>_<ΛΛ>B are reasonably reproduced. No bound state exists for the ΛΛ system. The ΛΛ total cross section is predicted.