B2OC: add 15 B2DDH lines (shifters PLEASE ignore)
15 B2DDH lines added in b_to_ddh_standalone
by Huanhuan Liu and Ruiting Ma,
all booked as Hlt2 lines.
Edited by Shunan Zhang
15 B2DDH lines added in b_to_ddh_standalone
by Huanhuan Liu and Ruiting Ma,
all booked as Hlt2 lines.