Desk clerk Frank (Troy Evans) normally talks about life to the "drive" as being a Chicago law enforcement officer. In the 1st episode, he had an visual appeal as a police officer, who was shot and addressed by the ER team.与其他光纤元件相比，掺铒玻璃相对昂贵，这会影响光纤通信系统的总体成本。The ER personnel's grad