It follows that if one has all of these factors present it may be necessary to obtain aids to help counteract the problems. For example a half-foot, to aid zip insertion, or to aid zip insertion, or to prepare cording.

• 如果你现在有上述的这些困难,有必要拥有一些辅助设备来解决这些问题。例如,单趾压脚可用来装拉链,或用来缝嵌线。