短语词组短语fixture pileup 夹具堆积;已夹具pileup rejection 脉冲堆积dislocation pileup 位错塞积as pileup 砷的堆积naturally pileup 自然堆存pileup effect 堆垒反应SKY pileup 天空堆积;正在翻译Pileup p 追尾pileup valve 集成阀 返回 pileup