3 sentences

1. 工程师正在仔细核对施工图纸。

   gōng​chéng​shī zhèng​zài zǐ​xì hé​duì shī​gōng tú​zhǐ.

   The engineer is carefully checking the construction blueprints.

   Source: Dong Chinese Dictionary

2. 这张图纸上绘有复杂的机器图形。

   zhè zhāng tú​zhǐ shàng huì yǒu fù​zá de jī​qì tú​xíng.

   This blueprint shows complex machine drawings.

   Source: Dong Chinese Dictionary

3. 由于设计错误，这两张图纸的内容重叠了。

   yóu​yú shè​jì cuò​wù, zhè liǎng zhāng tú​zhǐ de nèi​róng chóng​dié le.

   Due to a design error, the contents of these two drawings overlap.

   Source: Dong Chinese Dictionary