double glazing unit meaning in English

双层中空玻璃

Specification for hermetically sealed flat double glazing units
气密中空平板玻璃组件规范
Jinan hanyu glass machine limited company is a integrative corporation with scientific research , production and distribution , which produces product lines of middling and top grade double glazing unit and interrelated equipment professionally
济南韩宇玻璃机器有限公司是集科研开发、生产、销售于一体的企业，专业生产中、高档中空玻璃生产线及相关配套设备的厂家。