用for or of?

of

of

1. 经验,体验[U][(+of/in)]
She had no experience of life at all.
她毫无生活经验。
Have you had any experience of teaching English?
你有过教英语的经验吗?

这句话语法不太对
应该是：
I have been doing materials buying control and production control for about seven years.

应该是（for去除）：
I have been doing materials buying control and production control about seven years.

of应该是的吧

应该用of