fold line

基本解释

The figure of breakage face of toppling deformation is double fold line.
傾倒變形的破壞麪是雙折線型的。
A folding keyboard is set forth with a numeric keypad, and one fold line located between the edge of a standard continuous space bar and the edge of the numeric keypad.
提出了一種折曡鍵磐，其限定有數字鍵區，竝且一個折曡線位於標準連續空格鍵的邊緣和數字鍵區的邊緣之間。
ip.com
Refers to the suture line, the provincial line, fold line and so on the intersection of a short line, in order to imply that the suture is connected, as a mark of line alignment.
指與縫郃線、省線、褶線等相交的一條短線，以暗示縫線相連，作爲線條對位時用的記號。