semaphoren.信号灯；旗语v.发出信号或旗语semaphore counterweight臂板平衡锤semaphore counterbalance臂板平衡锤,臂板重锤semaphore type indicator臂板式表示器,臂板复示器semaphore queue management[计] 信号量排队管理semaphore arm direction indicator臂板信号指挥灯Semaphores and Process Mutual Exclusion信号量和进程互斥