patentipc/E21B10-52

http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-52

Outgoing Links

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title	with chisel- or button-type inserts
label	E21B10/52
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broader	http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B10-50

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