By IP PBX technology and soft exchange

• 技术与软交换

By IP PBX technology and soft exchange的用法和样例：

例句

1. We also observed the phenomenon of soft segment enrichement on the surface of SPU film by IGC, and the results were compared with those obtained from the ESCA experiments.
   苯及几种烷烃和聚醚氨酯的偏摩尔混合热和它的溶度参数与软段组分的溶度参数差值有关。