box spring
柯林斯词典
1. N-COUNT A box spring is a frame containing rows of coiled springs that is used to provide support for a mattress. You can also use box springs to refer to the springs themselves. 彈簧牀墊的框架或彈簧
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box spring (box springs)
剑桥词典
- a spring or set of springs fastened to a frame and covered in cloth , for supporting a bed
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