任务: task; job单元: unit; unit element; cell; lo ...最简单任务单元: story or engieering task任务单: job order工程任务单: engineering job order; engineering jop order; job assignment notice任务单位: task unit施工任务单: construction job sheet修理任务单: repair order层服务单元: lse layer service element服务单元: lsu lan service unit lan公务单元: order wire unit业务单元: business units存储服务单元: memory serve unit公共服务单元: csu common service unit公共业务单元: csu common service unit横向业务单元: lateral business unit密钥服务单元: ksu key service unit数据服务单元: data service unit dsu; dsu data service unit数据业务单元: dsu data service unit数字服务单元: data service unit; digital service unit数字业务单元: dsu digital service unit通道服务单元: csu网络服务单元: nsu network service unit信道服务单元: csu channel service unit; csu service unit; csu(channel service unit)信道业务单元: channel service unit (csu); csu channel service unit