HS Code Subheading 901580

9015.80.20 Optical surveying, hydrographic, oceanographic, hydrological, meteorological or geophysical instruments and appliances, nesi 9015.80.60 Seismographs 9015.80.80 Surveying, hydrographic, oceanographic, hydrological, meteorological or geophysical instruments and appliances, nesi, nonoptical