中zhòngyīngguànyòngduǎnyù:
| - zhōng jì jiāo huàn jī repeater exchanger
- zhōng jì chuán sòng wǎng inter-office transport network
- zhōng jì gōng shuǐ shuǐ dài relay supply-hose
- zhōng jì xìn hào jī transition signal
- zhōng jì jiā mì zhuāng zhì trunk encryption device
- zhōng jì fā shè jī relay transmitter
- zhōng jì fā shè jī repeater transmitter
- zhōng jì biàn yā qì relay transformer
- zhōng jì gān rǎo jī repeater jammer
- zhōng jì zhǐ shì qì repeater indicator
- zhōng jì jiē tóu Trunk Connector
- zhōng jì jiē shōu jī relay receiver
- zhōng jì jiē shōu jī link receiver
- zhōng jì xiāo huǒ shuān reverse hydrant
- zhōng jì tè xìng Trunk Characteristics
- zhōng jì zhàn , zhuǎn bō zhàn relay station
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