2 sentences for 主机 (zhǔ​jī — lead aircraft)

1. 僚机紧随主机飞行。

   liáo​jī jǐn​suí zhǔ​jī fēi​xíng.

   The wingman followed the lead plane closely.

   Source: Dong Chinese Dictionary

2. 在飞行编队中，两架僚机必须紧紧跟随主机的路线。

   zài fēi​xíng biān​duì zhōng, liǎng jià liáo​jī bì​xū jǐn​jǐn gēn​suí zhǔ​jī de lù​xiàn.

   In the flight formation, the two wingmen must closely follow the lead plane's route.

   Source: Dong Chinese Dictionary