熱ねっ価か

noun

heat range (spark plug); heating value

Technical term used in automotive and engineering contexts. 'Heat range' refers to a spark plug's ability to dissipate heat; 'heating value' is a broader calorific measurement.

• このエンジンには熱ねっ価かの高たかいプラグが必ひつ要ようです。

  This engine requires spark plugs with a high heat range.

• 燃ねん料りょうの熱ねっ価かを測そく定ていする。

  Measure the heating value of the fuel.