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Universal Instrument traces its roots to the Universal Instruments and Metal Company, a safety pin manufacturer founded in 1919. Through time, the company discontinued safety pin production and made a transition to a machining and tool and die busine
金属切削 metal cutting 机床 machine tool 金属工艺学 technology of metals 刀具 cutter 电路 circuit 半导体元件 semiconductor element 反馈 feedback 发生器 generator 直流电源
AS IT IS 2013-10-11 Legacy of Vietnamese General Remains Divisive Hello and welcome to As It Is from VOA Learning English! Im George Grow in Washington. Today we tell about the research that won three scientists the 2013 Nobel Prize for Physiology or
RACHEL MARTIN, HOST: Before Christopher Scott went to prison, he led a quiet life, spending as much time as possible with his sons. CHRISTOPHER SCOTT: In the place that I lived at, we had, like, a pond, so I used to take my two boys out and go feed t
NEW YORK, March 29 (Xinhua) -- New York Attorney General Eric Schneiderman announced on Tuesday that his office will undertake a thorough review of ATT's acquisition of T-Mobile for potential anti-competitive impacts on consumers and businesses. Schn