That is, a signature can be signed, which forms a countersignature, but that countersignature cannot be signed again.

也就是说，可以对签名进行签名，形成一个副署，但不能再对该副署进行签名。

youdao

That is, a signature can be signed, which forms a countersignature, but that countersignature cannot be signed again.

也就是说，可以对签名进行签名，形成一个副署，但不能再对该副署进行签名。

youdao