de deficiente calidad

= poor-quality, of poor quality

Ex. Not all paper was watermarked, especially during the later hand-press period when much poor-quality printing paper was made without any marks.

Ex. What's worse, the office supplies peddled by these bogus firms often are overpriced and of poor quality.

* * *

= poor-quality, of poor quality

Ex: Not all paper was watermarked, especially during the later hand-press period when much poor-quality printing paper was made without any marks.

Ex: What's worse, the office supplies peddled by these bogus firms often are overpriced and of poor quality.