押おさえ溝みぞ

noun

cap iron groove; blade groove (of a wooden plane)

Technical woodworking term for the groove in the body of a wooden plane that holds the blade and cap iron in place.

• 押おさえ溝みぞが摩ま耗もうすると、刃はがしっかり固こ定ていできなくなる。

  When the cap iron groove wears down, the blade cannot be held firmly.