Tightening key

Corner Key is a small wedge or block of board, timber or plastic, inserted into the slotted inside corners of a canvas stretcher frame to prevent or adjust sagging.

单词	Tightening key
释义	Tightening key 英语百科 Tightening key Corner Key is a small wedge or block of board, timber or plastic, inserted into the slotted inside corners of a canvas stretcher frame to prevent or adjust sagging.
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