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作者采用两种不同模数的水玻璃混合使用,根据气温调节水玻璃模数,解决了七○砂冬季难硬化问题,收到了良好的效果
The author uses two different modulus of water glass mixed use, adjust the water glass modulus according to the temperature, to solve the problem of seven sand sand hard hardened, received good results