曲折试验

衬板的打开试验已在JSC完成，正在进行分析。

set up folding bottom, cross bottom, block bottom

collapsible umbrella (folding umbrella)

Folding stock

folding in the manufacture of three-dimensional articles

trimming press (folding press, bending press, power break)

uniting the side walls of folding boxes while folding

folding, from a single blank, from a single cardboard

accordion door【建】;folding door【建】