And research the effect of the steel fiber length, the max coarse aggregate size and specimen size on the fracture toughness of SFRC by contrast test.是什么意思_And research the effect of the steel fiber length, the max coarse aggregate size and specimen size on the fracture toughness of SFRC by contrast test.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句