Imports In 2004, British Indian Ocean Territory imported $1.68k in Rock drilling, boring heads of sintered metal, carbid, becoming the 0th largest importer of Rock drilling, boring heads of sintered metal, carbid in the world. At the same year, Rock drilling, boring heads of sintered metal, carbid was the 0th most imported product in British Indian Ocean Territory. British Indian Ocean Territory imports Rock drilling, boring heads of sintered metal, carbid primarily from: N/A.