Warning: file_put_contents(): Only 0 of 4878 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/62383.com/index.php on line 55 echo sounding例句_echo sounding英汉例句_echo sounding双解例句_流逝汉英词典
It also carries out surveys through two specially-designed vessels which are fitted with the latest type of equipment including multi-beam echo sounders. 该部配备两艘经过特别设计的测量船，船上装有最新类型的设备，包括多波束回声测深仪。