This paper raises a delete principle which inferring the spectrum term of four equal electrons' system in L-S couple and gives a certificating.
本文提出四个同科电子体系在L-S耦合中确定光谱项的“删除法则”，并加以证明。
The construction and application of OA System is the key method for certification body to improve its standard and efficiency, to fulfill its growing demand of certificating request.
认证机构O A系统的建设与应用是提高认证机构管理水平和运行效率、满足不断增长的认证业务需求的重要手段。
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