The problem may be due to poor workmanship.

问题可能是出在拙劣的工艺上。

《柯林斯英汉双解大词典》

It's evident that the rust is due to poor workmanship.

事实表明生锈是因为粗糙的工艺。

youdao

It's evident that the rust is due to poor workmanship.

事实表明生锈是因为粗糙的工艺。

youdao