N、S极交替布置的磁场处理的磁化水对水泥活性影响的研究
N、S겁교체포치적자장처리적자화수대수니활성영향적연구
The Influence of the Magnetizing Water Treated by the Magnetic Field Arranging N-Pole and S-Pole Alternately on Cement’s Vigor
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