A lower end of a thread guide lever, which is rockably attached to a lower looper and supports a thread pipe, and an air ejecting unit, which faces a thread inserting hole of the thread pipe and ejects air toward the thread inserting hole, are coupled via a coupling member so that they are interlocked with each other. It is associated with a management device comprising admission means to insert a new node within the peer-to-peer network. The porous material of the base promotes bone ingrowth allowing the implant to fuse strongly with the bone of a host patient.