a chamber of commerce的用法和样例：
- The chamber of commerce helps merchants a lot.
- Sometimes, however, all that is needed is a certificate of value endorsed by a chamber of commerce, and combined with a certificate of origin.
- Kurri Online - A Chamber of Commerce united web presence for businesses. It also includes information on current events, tourism and heritage sites.
- CO must be certified by a chamber of commerce or industry and legalized by BAHRAIN embassy or any arab diplomatic mission in theexporting country if any!
- The Insurance Policy (if called for) and Certificate of Origin in languages other than English or Arabic are acceptable only if duly countersigned by a Chamber of Commerce.