Effect of the perlite admixture on the pore structure, such as porosity, median pore diameter, pore specific surface area, and pore size distribution was analyzed and discussed.
为探讨珍珠岩掺合料对水泥基材料性能影响的机理,用压汞法测试掺加质量分数为0～40%珍珠岩掺合料水泥石的微孔结构参数,分析珍珠岩掺合料对3,28,60d龄期水泥石孔结构参数:孔隙率、中值孔径、孔比表面积和孔级配的影响。
The Application of Thinned Array Time Division Multiple Phase Center Synthesis
稀疏阵时分多相位中心孔径综合及其应用
thin overlapping plates can be adjusted to change the diameter of a central opening.
能够调整改变中心孔径的直径的薄的重叠金属板。
The plate has holes of approximately 2 in. in diameter on 7-to 8-in. centers in staggered rows.
板上有直径近2英寸的孔眼，交错横排，孔眼中心距为7-8英寸。
Discussion on the Diameter of Main Section in Medium-shallow Hole in Diamond Core Drilling for Geological Exploration
地质勘探金刚石岩心钻探中浅孔主体口径探讨
Rotating center estimation for inverse synthetic aperture radar imaging
逆合成孔径雷达目标等效旋转中心估计
Drill a 12-mm (1/8-in) diameter hole in the top center of the fan shrou
在风扇围板顶部中心钻一个直径12毫米（1/8英寸）的孔。
Research on effect of modulated noise jamming for multiple phase center azimuth multi-beam SAR imaging
线性调频噪声对多相位中心多波束合成孔径雷达成像的影响研究
Finite Element Analysis on Hole Radius of Circular-Web Opening Steel Beams
圆形开孔梁中开孔半径的有限元分析
Research of Determination of Pore Size and Distribution of PVDF Hollow Fiber Porous Membrane;
聚偏氟乙烯中空纤维多孔膜孔径及孔径分布测试方法的研究
a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror.
具有抛物面主镜和双曲面次镜的一种折射式望远镜；光线被集中到主镜中心的孔径。
Performance Analysis of Large-Aperture Receiving and Selection of Aperture Size in Atmospheric Optical Communications
大气光通信中大孔径接收性能分析与孔径尺寸选择
balancing centering machine
平衡-钻中心孔机床
spotfacing and centering machine
平端面钻中心孔机床
Center of radius at bottom front to center of radius at top rear
底前半径中心到顶后半径中心
The effect is not apparently when using methods of large-diameter barrels,cementation and so forth during branching drilling in Cenozoic loose beds.
采用粗径岩心管、水泥封闭等方法在新生界松散层中人为叉孔有时效果不太明显。
Method of Collimation and Image Processing Using CCD Pickup Camera in Aperture Measurement
孔径测量中ccd瞄准方法与图像处理
Phase Unwrapping in Inteferometric Synthetic Aperture Radar;
合成孔径雷达干涉测量中的相位展开
Research on Measurement for Aperture Jitter of ADC;
模数转换电路中孔径抖动的测量研究
