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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. |
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