2 sentences for 铁杆 (tiě​gǎn)

1. 他们几个人是多年的铁杆哥们儿。

   tā​men jǐ gè rén shì duō nián de tiě​gǎn gē​men'ér.

   The few of them have been die-hard buddies for many years.

   Source: Dong Chinese Dictionary

2. 他用一根铁杆撑住了摇摇欲坠的窗户。

   tā yòng yī gēn tiě​gǎn chēng​zhù le yáo​yáo​yù​zhuì de chuāng​hu.

   He used an iron rod to prop up the shaky window.

   Source: Dong Chinese Dictionary