The types of nozzle and lance used must be appropriate for the type of work and all operators must be experienced in the use of the particular combination chosen.是什么意思_The types of nozzle and lance used must be appropriate for the type of work and all operators must be experienced in the use of the particular combination chosen.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句