Master: (1) A plate for a duplicating machine or small offset machine. (2) Original tape, disc, film, etc from which copies will be made.
纸版，（2）原版样：（1）复印机或小型柯式机用的印版。（2）作复制用的原版磁带，磁带，菲林等。
Offset paraboloid antenna has widely been utilized in small aperture antennas. The principles of it's formation, characteristics, machine - dimension and design calculation were introduced.
偏置抛物面无线在小口径天线中得到了广泛的应用。本文就偏置抛物面的形成原理、特性、机械尺寸及设计计算等作一简略介绍。
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