[Ｐ幣] 加減賺
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subpart 1.2
seismology
global seissmology
and seismic waves
4.1 waves,pluses,and rays
4.2 detecting seismic waves:
seismometers and geophones
4.3 the earth is concerntrically layered
4.4 finding the path of a ray through the earth
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※ 發信站: 批踢踢實業坊(ptt.cc)
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