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DIFF Subgroup
E21B 33/138

Plastering the borehole wall; Injecting into the formation

Introduced: September 1968

Full Title

Sealing or packing boreholes or wells > in the borehole > Methods or devices for cementing, for plugging holes, crevices or the like > Plastering the borehole wall; Injecting into the formation

No child classifications to compare. This is a leaf node in both IPC and CPC.