In North China, freezing-thaw and carbonization of concrete are harmful to water conservancy project.
In North China, freezing-thaw and carbonization of concrete are harmful to water conservancy project.
摘要我国北方地区混凝土冻融、碳化对水利工程危害较大。
In North China, freezing-thaw and carbonization of concrete are harmful to water conservancy project.
摘要我国北方地区混凝土冻融、碳化对水利工程危害较大。