ȸҰ
ȸ翬
ô±
ñ  Ű?
 
 
 
ȳ Ͻʴϱ?

ͻ âϽ Ͽ, ؼ λ 帮 մϴ.

1987 ȸ â̷, DEEP HOLE ǵ帱 ߿ Ͽ 1990 ʷ ǵ帱 ȭ ǵ帱 ü 迡 õ ϰ ֽϴ.

2~50 ǵ帱, γǵ帱, Ǹ, ܰǵ帱, B.T.A.Ʃ ǵ帱 踦 Ǽ縮 ϰ ֽϴ. 1997 ؿܿ ޾ ϱ Ϻ. ߱,
ε ƽþ κ ǰ ü Ϻ ̷ ֽϴ.
׵ ô deep hole drilling toolо
ȸ簡 ӵ帳ϴ.

δ ǵ帱 BTA ̿Ͽ 2~105 ȯ, кǰ TUBE SHEET, BOLSTER
ǰ մϴ. 8 ǵ帱 BTA踦 ־ پ ǰ ƴ϶ ֽϴ.

ϵ ȸ ִ ʤ̫, , ҡѢ Ű ȸ ϰڻ ְ Ѻ ֽð
Ź帳ϴ.