1997 seismic tracklines off the coast of Washington and Oregon (geographic coordinates)
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Two 21-day field operations were conducted in 1997 and 1998 in the estuaries and on the inner continental shelf off the northern Oregon and southern Washington coast....
1997年与1998年，在俄勒冈州北部及华盛顿州南部沿岸外海的河口（estuaries）与内大陆架（inner continental shelf）海域，开展了两次为期21天的野外作业……
