B通道顺序号
B channel sequence number BSN
按序卸货号码下次卸货序号
following landing numbers
地层序号
ordinal number of stratum
发动机标志序号
engine identification number
发动机布置序号
engine arrangement number
发动机超速控制总成零件序号
engine overspeed control assembly part number
反向序号
BSN Backward Sequence Number
反向序号收到
BSNR Backward Sequence Number Received