源: source; fountainhead服务: give service to; be in the s ...访问: visit; call on; interview; a ...点: drop地址字段: address field目地服务访问点地址字段: dsaaddress源服务访问点: source service access point目标服务访问点地址: dsapa destination service access point address服务访问点: saservice access point; service acce point (sap); service access point传输层服务访问点: transport service access point传输服务访问点: tsa transport service access point; tsatransport service access point传送服务访问点: tsa transfer service access point服务访问点标识符: service access point identifier目标服务访问点: destination service access point网络服务访问点: network service access point物理层服务访问点: physical layer service access point服务存取点, 服务访问点: service access point传送服务访问点标识符: tsap-id transfer service access point identifier; tsap-id transfer service access point identifier数据链路层服务访问点: data link layer service access point业务接入点;服务访问点: service access point (sap)地址字段: addre field; source address field地址字段[部分: address field地址字段长: address size段地址字段: segment address field基地址字段: base address field