“pendulum seismograph”的概念、定义、翻译、参考文献-科学参考

单词	pendulum seismograph
释义	pendulum seismograph [`pen·jǝ·lǝm `sīz·mǝ´graf] ^ENGINEERING A seismograph that measures the relative motion between the ground and a loosely coupled inertial mass; in some instruments, optical magnification is used whereas others exploit electromagnetic transducers, photocells, galvanometers, and electronic amplifiers to achieve higher magnification.
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