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PCE
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CPC Subgroup
F02N 7/12

the engines being of rotary type, e.g. turbines (F02N7/14 takes precedence)

Full Title

Starting apparatus having fluid-driven auxiliary engines or apparatus > characterised by using auxiliary engines or apparatus of combustion type (by using explosive cartridges F02N13/00) > the engines being of rotary type, e.g. turbines (F02N7/14 takes precedence)