英语翻译One original and three copies (1/3) of certificate of origin issued by Chamber ofCommerce shall be issued at loading country; （1）翻译全句（2）这里的copies是指3份正本还是3份副本?（3）如果是正本的话那前面

英语翻译
One original and three copies (1/3) of certificate of origin issued by Chamber ofCommerce shall be issued at loading country;
（1）翻译全句
（2）这里的copies是指3份正本还是3份副本?
（3）如果是正本的话那前面的original又是什么意思呢?并且如何正确表示三份副本?

需要在装货国提供中商会签发的原产地证书,一正三副.
copy指副本.
Original就是正本,3 copies of C/O表示3份副本