| 双向信道 two-way channel |
| 双向加速器 two-way accelerator |
| 双向同步加速器 two-way synchrotron |
| 双向天线 bilateral antenna |
| 双向对流 bilateral flow |
| 双向开关 a two-way switch |
| 双向性传导 conduction in double directi... |
| 双向拉伸机 biaxial orientation stretchi... |
| 双向排水 double drainage |
| 双向操作 bidirectional operation |
| 双向无线电通信系统 two-way radio system |
| 双向测向计 double goniometer |
| 双向犁 hillside plough |
| 双向电动机 reversing motor |
| 双向电流 bidirectional current |
| 双向电视 the two-way television |
| 双向电话 two-way telephone |
| 双向轨制 the dual-track pricing syste... |
| 双向选择制度 two-way choice system |
| 双向通信 two-way communication |
| 双向通道 duplex channel |
| 双向采煤 bidirectional cutting |
| 双向飞碟射击 skeet shooting firing |
| 双吸泵 double entry pump |
| 商业性渔业 commercial fishery |
