Carpentry.
a heading joint in which the end of one member, notched to form two parallel tenons, is fitted into two gains cut into the edges of a second member.
Carpentry.
a heading joint in which the end of one member, notched to form two parallel tenons, is fitted into two gains cut into the edges of a second member.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012