sˈænd ænd slˈæʃ ɔːɹ ɡɹˈævəl pˈækɪŋ ɪz mˈɛnt tʊ ᵻlˈɪmᵻnˌeɪt pˈɑːɹɾɪkəlz fɹʌmðə wˈɔːɾɚ bᵻfˌoːɹ ðeɪ ɹˈiːtʃ ðə skɹˈiːn wˌɪtʃ ðeɪ wʊd ˈʌðɚwˌaɪz hæv pˈæst θɹˈuː.
Sand and/or gravel packing is meant to eliminate particles from the water before they reach the screen which they would otherwise have passed through.