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No.88, Kaiyuan Road, Changsha National E. & T. Development Zone,Changsha,Hunan,China China
Whatever form of casing is, casing shoe must be fitted on top of casing when put into drill hole. The edges of casing shoe exposed to rocks are very f
連絡先担当者 Mr. Tony Tang
住所 No.88, Kaiyuan Road, Changsha National E. & T. Development Zone, Changsha, Hunan
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