“optical square”的概念、定义、翻译、参考文献-科学参考

单词	optical square
释义	optical square [`äp·tǝ·kǝl `skwer] ^ENGINEERING A surveyor's hand instrument used for laying of right angles; employs two mirrors at a 45° angle.
随便看	talc talcose rock talcosis talc schist talik talipes talipes cavus Talitridae talk-back circuit talking talking battery talk-listen switch tall building tall oil tallol tallow tallow-seed oil tally talon Talpidae talus talus creep talus glacier talus slope tamarack

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