常見例句雙語(yǔ)例句This paper presented a new non-contact method to meter CO concentration and smoke optical density simultaneously and online based on photoacoustic technology.本文提出一種利用光聲技術(shù)同時(shí)在線測(cè)量CO濃度和菸霧消光的非接觸式方法。 返回 smoke density meter