Isso fará o download dos dados do json que preenchem a tabela:
curl --data "action=getDrugCompanyDatabaseData" http://www.dgda.gov.bd/administrator/components/com_jcode/source/serverProcessing.php
Ou salve-o em um arquivo
curl --data "action=getDrugCompanyDatabaseData" http://www.dgda.gov.bd/administrator/components/com_jcode/source/serverProcessing.php > output.json