two-tone的用法和樣例：
詞匯搭配
- two-tone dyeing 雙色調染色
- two tone telegraph system 雙音電報制
- two tone telegraph detector 雙音電報檢測器...
- two tone transmission 雙音頻傳輸制...
- two tone modulation 雙音調調制
- two tone working 雙音工作制
- two tone channel 雙音通路
- two-tone stripe 雙色條紋
- two tone system 雙音系統
- two-tone keying 雙音頻鍵控
- two tone detector 雙音檢測器
- two-tone modulation 雙音頻調制
- six channel two tone 六路雙音
- two-tone paint 雙色油漆
- two tone method 雙音信號法
- two tone keying 雙音鍵控
