Seismic wave - Notation. 1  The path that a wave takes between the focus and the observation point is often drawn as a ray diagram. 2  For example... 3  ScP is a wave that begins traveling towards the center of the Earth as an S wave. 4  sPKIKP is a wave path that begins traveling towards the surface as an S-wave.
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The term for invention patents in China is 20 years from the filing date. The term for utility model patents is 10 years from the filing date. If you require a more detailed answer, please send us your question using the contact form. Top of page.