Search on: PERCUSSION DRILLING 
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Descriptor English:   Percussion Drilling 
Descriptor Spanish:   Perforación por Percusión 
Descriptor Portuguese:   Perfuração de Percussão 
Tree Number:   SP4.021.197.118.514.420
Allowable Qualifiers English:  
AE adverse effects AN analysis
CL classification EC economics
ES ethics EH ethnology
HI history LJ legislation & jurisprudence
MT methods PL policies
PC prevention & control SN statistics & numerical data
Record Number:   25427 
Unique Identifier:   DDCS025427 

Occurrence in VHL: 		 

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