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41. | call re-direction |
| 呼叫改向 |
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42. | sequnce calling |
| 顺序呼叫 |
|
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43. | unsuccessful call |
| 不成功呼叫 |
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44. | calling duration |
| 呼叫持续时间 |
|
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45. | call number |
| 呼叫号码 |
|
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46. | call processing |
| 呼叫处理 |
|
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47. | a calling signal; a call sign |
| 呼叫信号 |
|
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48. | called telephone |
| 呼叫电话 |
|
|
| |
49. | call control character |
| 呼叫控制字符 |
|
|
| |
50. | duration of call |
| 呼叫时间 |
|
|
| |