- Sungchang International Inc.
- Down the hole Hammer,YH-3000,Casing Oscillator,RCD Bit,YH-2000.
- Address:Ba-4324,Gurobon-dong ,Guro-gu
- Hanjin Drilling Co., Ltd.
- Hanjin Drill(D&B) Co Ltd. Water well drill rigSoil investigation drill rigHDD drill rigBlast hole drill rigDTH Hammer& BitDrilling Accessories.
- Address:1612 Jidong 76 Soongin-Dong, Jongno-Gu
- Kukje Diamond Ind. Co. Ltd.
- Down The Hole Hammer And Bits, Down The Hole Hammer Parts, Hammer Bits,Earthwork Products,Machining Tool,Mining Machinery.
- Address:B. 38 L. 3 Namdong Industrial Complex
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