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套管
May 16, 2022
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casing
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casing 00:15
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套管
May 16, 2022
Interligação de 120 m de barras de fricção Kelly para máquinas de construção de fundações 01:12
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October 18, 2023
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February 16, 2022
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January 21, 2022
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November 09, 2022
Foundation Piling Kelly Bar Drill Rig Sr150 Sr200 Sr238 Sr285 Sr405 03:17
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March 02, 2022
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April 21, 2022
sr150 sr200 sr238,sr285 sr405 interlocking kelly bar 00:44
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January 21, 2022