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sonar
sonar
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
seiliwyd y cyflwyniad ar ganlyniadau llawer iawn o gyfarpar soffistigedig , gan gynnwys monitro lefelau'r tywod â laser , sonar i sefydlu dyfnder y dŵr a'r tywod , yn ogystal â ffotograffau o'r awyr i fonitro ein traethau
the presentation was based on the results of a great deal of sophisticated equipment , including laser monitoring of sand levels , sonar to establish the depth of water and sand , as well as aerial photographs monitoring our beaches
