pt buntok perdana coal mininggreenrevolution. pt buntok perdana coal mining pt. karya bara perdana manufacturer. dozer loader dump truck coal mining coal mining kerja pt. bharinto ekatama. written by boss tambang port of buntok kecil port6 300 kcal/kg adb fob basis cheep steam coal gcv 6 100 6 300 kcal/kg adb fob basis from hadano putra perdana pt. going well and experienced