“老客户”的英文怎么说？

1
This company is our regular customer.
这家公司是我们的老客户。
She has been a client of our bank for ten years.
她已经成为我们银行十年的老客户。
You have quite a lot of regular customer so far as I know.
据我所知，你们有许多老客户。
We always dislike refusing requests of any kind from regular customers, but regret we have no choice but to do so.
我们一贯不愿拒绝老客户们提出的任何要求，但遗憾的是我们别无选择，只能拒绝上述请求。
Additional Words and Phrasespolicy-holder
保险客户
potential clients; expected income.
可能的客户；预期收入。
Salespeople visiting their accounts.
推销员拜访了他们的客户
A creditable customer.
一个信誉卓著的客户
I call up a client.
我打电话给客户。
Our customer is very select.
我们的客户是精心挑选的。

regular customer~

regular customer
This company is our regular customer.
这家公司是我们的老客户。

Frequent Customers