BM50B-SRDS-A-G-TFC BM50B-SRDS-A-G-TFC(LF)((SN) BM50B-SRDS-A-G-TFC(LF)(SN) BM50B-SRDS-G-TF BM50B-SRDS-G-TF (LF)(SN) BM50B-SRDS-G-TF(LF)(SN) BM50B-SRDS-G-TFC BM50B-SRDS-G-TF-C BM50B-SRDS-G-TFC(LF) BM50B-SRDS-G-TFC(LF)(SN)