1)cluster,群;串2)multiple serial port devices,串口设备群3)series small hydropower sations,串联小水电群4)cluster,n.丛,群,串 v.群集,丛生5)pulse train,脉冲串，脉冲序列，脉冲群6)group of series-connected semiconductor lasers,激光二极管群串联
用法例句
Integration methods and realization of multiple serial port devices based on PROFIBUS-DP;