钉头

Some showing curve shape, some not to have hammer needle without nailhead, some.

有弯曲状、有无钉头、有无钉尖。

Nail head thermocompressor transmission design, combined with gear box-type and the advantages of a chain of driving on the easy-to-repair, maintenance, low-efficiency drive failure rate.

钉头复合式传动设计，结合齿轮箱式及链条式传动优易于维修、保养，故障率低高效传动。