4 sentences

1. 他的缝纫手艺非常精湛。

   tā de féng​rèn shǒu​yì fēi​cháng jīng​zhàn.

   His sewing skills are superb.

   Source: Dong Chinese Dictionary

2. 妈妈把她的缝纫机给我了。

   mā​ma bǎ tā de féng​rèn​jī gěi wǒ le.

   My mother gave me her sewing machine.

   Source: Tatoeba

3. 她擅长缝纫，会给自己做衣服。

   tā shàn​cháng féng​rèn, huì gěi zì​jǐ zuò yī​fu.

   She is good at sewing and can make her own clothes.

   Source: Dong Chinese Dictionary

4. 缝纫机的底线断了，需要重新安装。

   féng​rèn​jī de dǐ​xiàn duàn le, xū​yào chóng​xīn ān​zhuāng.

   The bobbin thread of the sewing machine broke and needs to be reinstalled.

   Source: Dong Chinese Dictionary