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- null frequency indicator 零频指示器
- resonant circuit type frequency indicator 谐振式频率指示器
- resonant-circuit tyep frequency indicator [电] 谐振电路型频率指示器
- The state or quality of being null. 无效无效的状况或性质
- The act of making null and void. 废除使 ... 作废和无效
- He varied the transmission frequency. 他变换了无线电传送的频率。
- instantaneous frequency indicating recei 瞬态功率指示接受器
- The contract was null and void because it was not signed. 这个合同无效，因为它尚未签字。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- The court ruled that the claim was null and void. 法庭裁决此项要求无效。
- The marriage was declared null and void. 婚姻已宣告无效了。
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- The null subset corresponds to the term 1. 空集则对应于常数项1。
- A null reference pointer was passed to the stub. 向占位程序传送了空的索引指针。
- The agreement was declared null and void. 这个协议被宣布无效。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- A promise obtained by force is legally null. 一个以武力获得的契约在法律上是无效的。
- The operator O is the null operator. 算符O是零算符。
- Microwave Instantaneous Frequency Indication Receiver 微波即时频率指示接收器
