ratio design的用法和樣例：
例句
- The characteristics and mixture ratio design of the polypropylene fiber shotcrete are introduced.
摘要介紹了聚丙烯纖維噴射混凝土的特點(diǎn)及其配合比設計。 - The paper mainly discussed the process of flyash concrete mix design and the application to Zhangshi Expressway bridge construction.
重點(diǎn)探討粉煤灰混凝土配合比的設計過(guò)程及在張石高速公路橋梁施工中的應用。
