2 sentences for 专用 (zhuān​yòng — special-purpose)

1. 这种机器需要专用的润滑油。

   zhè zhǒng jī​qì xū​yào zhuān​yòng de rùn​huá​yóu.

   This machine requires a specific type of lubricating oil.

   Source: Dong Chinese Dictionary

2. 这条指令是通过专用通信通道发送的。

   zhè tiáo zhǐ​lìng shì tōng​guò zhuān​yòng tōng​xìn tōng​dào fā​sòng de.

   This instruction was sent through a dedicated communication channel.

   Source: Dong Chinese Dictionary