Lead in optical and filter glass.

光学玻璃及滤光玻璃中所用的铅。

youdao

We can also make optical filter glass of special size according to our client requirement.

我们也可按照客户的需要，定制特殊规格的光学滤色镜。

youdao

We can also make optical filter glass of special size according to our client requirement.

我们也可按照客户的需要，定制特殊规格的光学滤色镜。

youdao