您好！我是商务参赞处的。

Hello! I'm from Commercial Counsellor's Office.

youdao

我们是从……大使馆商务参赞处那得知你公司名址。

We owe your name and address to the Commercial Counseller's Office of the... Embassy...

youdao

承蒙驻…的…大使馆商务参赞处告知你方的名称和地址。

We own your name and address to the Commercial Counselor's Office of... Embassy in...

youdao

承蒙驻…的…大使馆商务参赞处告知你方的名称和地址。

We own your name and address to the Commercial Counselor's Office of... Embassy in...

youdao