3 sentences

1. 肯定是闪电击中了连接处。

   kěn​dìng shì shǎn​diàn jī​zhòng le lián​jiē​chù.

   Lightning must have struck the connections.

   Source: OpenSubtitles

2. 这个连接处的枢纽已经磨损了。

   zhè gè lián​jiē​chù de shū​niǔ yǐ​jīng mó​sǔn le.

   The pivot at this connection has worn out.

   Source: Dong Chinese Dictionary

3. 这个管道连接处漏水了，需要更换法兰。

   zhè​gè guǎn​dào lián​jiē​chù lòu​shuǐ le, xū​yào gēng​huàn fǎ​lán.

   This pipe joint is leaking and needs a new flange.

   Source: Dong Chinese Dictionary