It operates 15 drilling rigs, 70 various types of AHTS vessels, 5 oil tankers, 5 chemicals carriers, 7 seismic vessels, and 4 geo-tech survey vessels.是什么意思_It operates 15 drilling rigs, 70 various types of AHTS vessels, 5 oil tankers, 5 chemicals carriers, 7 seismic vessels, and 4 geo-tech survey vessels.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句