Under special conditions a BPF may also be used as an LPF or as an HPF . filter carrier-current for line telegraphic or telephonic systems

在特殊条件下，带通滤波器也可以用作低通滤波器或高通滤波器。载波滤波器，有线电报或 电话系统用

Referring to our telephonic message of today please deliver the above ten cases tomorrow .

根据我们今天的 电话 交谈，请于明日运来上述 货物10箱。

Hong kong 's businesses and consumers rely heavily on voice telephonic services .

香港的商业活动和消费者非常依赖话音 电话服务。

The experimental results show that the burglar alarm system 's reliability resorting to telephonic communication is boosted immensely .

实验证明，该 无线呼救系统极大地提高借助 固定 电话通信的防盗报警器的可靠性。

Phone Call Telephone Measurement and Analysis of Electromagnetic Interference from Telephonic Communication Equipment

电话通信设备电磁干扰的测量分析

Filter carrier-current for line telegraphic or telephonic systems

载波滤波器，有线电报或 电话系统用