Coak
扣榫； 栓销 sunk coak (木工)凹榫槽
🗣️ 情景例句
About Mom and Dad.
爸爸和妈妈。
Music is the medicine of the breaking heart.
音乐是医治心灵创伤的妙药。
The most wonderful piece of machinery on show was Nasmyth's steam hammer.
其中最奇妙的是内史密斯的蒸汽锤。