Any hair over four inches in length is put through a needle felting machine first.

任何长度超过四英寸的头发都会先通过针刺毡机。

The program allows you to set up your own hair mat-making factory in your own location and all the supplies and materials like the felting machine to each partner.

该计划允许您在自己的位置建立自己的发垫制造工厂，并将所有用品和材料（如毛毡机）提供给每个合作伙伴。