Pollution Control Agency污染控制局 Principal Component Analysis主成分分析 Pyrrolidone Carboxylic Acid吡咯烷酮羧酸 Positive Control Area绝对管制区 Password Call Acceptance (call screening)打电话叫筛选接受(密码) Process Change Authorization工艺变更的授权 Project Control Analyst项目管理人员 Physical Configuration Audit物理结构审核 Personal Care Attendant个人护理人员 Plant Conservation Alliance植物保护联盟 Personal Communication Controller手提式通讯终端设备 Power Control Algorithm功率控制算法 Pesticide Control Authority农药控制的权威 Process Corrective Action过程的纠正措施 Polish Classification of Activities波兰分类的活动