two-line的用法和样例：
词汇搭配
- two line ground 双线接地
- two terminal line 两端线路
- two conductor line 双导线传输线路...
- two wire line 二线制线路
- two party flat rate line 平均支付两户合用线...
- two line repeater 二线制中继装置...
- two line hunt feature 两线寻线性能...
- two-yard line 两码线
- two-action line 双向传输线
- two-conductor line 双导线线路
