标准工业粘度计
测定低流动性和干硬性水泥混凝土混合料稠度的仪具。由附有漏斗的截头圆锥筒、圆柱筒、圆环、圆盘、测杆等组成。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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