美国VirTis www.virtis.com
美国VirTis公司成立于1953年.是著名的冷冻干燥机等产品的生产厂家，其产品包括：实验室冻干机、中试及生产型冻干机、机械搅拌器、超声波细胞破碎器和发酵罐等。

Founded in 1953, VirTis manufactures a wide range of standard and configure-to-order laboratory, research and production-scale freeze drying systems. VirTis products are developed in an ISO 9001:2000 registered facility.
VirTis laboratory and production equipment is designed for the biotechnology, biochemical, agricultural research, pharmaceutical and life science industries. The company is considered a world leader in freeze drying technology, pioneering and perfecting the technology needed for research and commercial freeze-drying. Virtis products continue to advance the application of lyophilization when the need to separate, concentrate, dry and process materials is demanded.