Pure water. Ultrapure water such as water treatment.

纯净水。超纯水等水处理。

The first ultrapure fiber was made just four years later, in 1970.

仅仅四年之后，全球首个超纯纤维就于1970年问世。

The first ultrapure fiber was made just four years later in 1970.

仅仅四年之后，全球首个超纯纤维就于1970年问世。

It provides reliable quality products with stable and pollution-free ultrapure water.

产品质量可靠，超纯水水质稳定无污染。

In 197o, researchers at Corning Glass Works were able to produce a kilometer-long ultrapure optical fiber.

1970年，康宁玻璃厂的研究者们能生产出了光可以穿行1千米的超纯光纤。