We compared the transmission performances of 600 Gbit/s PM-64QAM WDM signals over 75. 6 km of single-mode fibre (SMF) using EDFA. discrete Raman. hybrid Raman/EDFA. https://www.spidertattooz.com/China-Glaze-I-Believe-In-Snuffy-0-5-oz-84679-p12258/