【单选题】【消耗次数:1】
现行规程规定,采用维卡仪测定水泥标准稠度用水量,以试杆距底板的距离为( )作为水泥净浆达到标准稠度的判定标准。
3mm±1mm
4mm±1mm
5mm±1mm
6mm±1mm
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