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By certification 
SINODRILLS Anchor coupler
Anchor coupler or called coupling sleeve, which is used to extend the anchor string as required length.
Thread type: R25, R32, R38, R51, T30, T40, T52, T73, T76, T103, T111, T127, T130 etc.
Anchor coupler or called coupling sleeve, which is used to extend the anchor string as required length.
Thread type: R25, R32, R38, R51, T30, T40, T52, T73, T76, T103, T111, T127, T130 etc.
