用spring bed造句子，“spring bed”造句

2、It's not good to sleep on a spring bed - blood circulation is broken.

1、It is a spring bed.

3、The prior knotted bed core output device can not be used for the delivery of non-core knotting spring bed core.

4、The utility model is based on the height and length of the bed core to adjust the output device and the device is suitable for various non-knot spring bed cores.