primary arm主臂primaryadj.首要的；主要的；初级的；初等教育的；根本的；初期的n.第一位；初选；最主要者；要素；原色；初级线圈primary mucous cystadenoearcinoma of appendix阑尾原发粘液囊腺癌Primary chronic pseudo-obstruction of colon结肠原发性慢性假性梗阻Primary Account Holder Financial QuestionairePrimary underwriters of government securities国债一级自营商Primary idiopathic restrictive cardiomyopathy原发性特发性限制性心肌病Primary standard for mid-frequency vibration中频振动基准装置Primary blood platelet reduction hemacelinosis原发性血小板减少性紫癜Primary endomyocardial fibrosis cardiomyopathy原发性心肌内膜纤维变性心肌病primary bronchogenic carcinoma peripheral type原发性支气管癌[周围型]primary and subsidiary satellites illuminators主副卫星照射源