what does "established" represent in this sentence

来源：百度知道 编辑：UC知道 时间：2024/05/27 02:54:33
We are a well established company dealing in all kinds of electrical products -lightning and cables.

in the above sentence, is "established" necessary? what's the meaning of its exist.

well established
well-founded, has a secure basis

基础雄厚的

我们是一家已注册的公司经营着各种类型的电力产品-电灯和电缆。

established在这里表示公司已是注册了的。