开孔,孔性固体中与外界连通的空腔和孔道。
n. trepanning
数字灯 节能等级1 3寸克三圈车铝筒灯材质及特性尺寸(dimension):外100mmXH110mm开孔(cut-out):φ80mm 材质组装 ( Materrial ):锌(zinc)+铁材(Steel)包装数量(Qty/Ctn):50pcs灯具采用优质铝材合金,经过抗冲,低温...
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...充层单位体积内 颗粒的质量 12、颗粒中包含两种空隙: 闭孔(closed pore): 包含在颗粒内部且不于外界接触的孔; 开孔(open pore): 部分与外界相通的孔; 13、阿基米德法测密度 比重瓶法测定:比重瓶容积20ml,需测量:比重瓶空瓶重m0;比重瓶含满液体的重量 m...
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... 指从一个点上向空间辐射声波的音箱。比较“线声源式音箱”(line-Source loudspeaker)。 开孔(port) 指倒相式音箱的开孔处因有急迅的空气流过而产生的噪声,也称为“噗嗤声”(Chuffing)。 ...
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开孔尺寸 Cut-Out ; hole size ; Cut-Size ; Hole-cutting Size
开孔凿 hole punch
开孔补强 reinforcement of openings ; in opening reinforcement ; reinforcement for openings
开孔器 Tapper ; hole saw ; Hole saws & Adaptors
模版开孔面积 open stencil area
开孔面积百分率 open mesh area percentage
开孔装置 punching device
开孔率 aperture ratio ; [建] percent opening ; fractional hole area ; percentage of opening
封头开孔 head opening ; opening in head
The reinforced concrete plate changes its mechanical behavior after openings and stress concentration will appear around the opening.
钢筋混凝土板开孔后受力性能会发生改变,孔的周围出现应力集中。
参考来源 - 钢筋混凝土板的有限元法分析In this paper it has an intensive study to the disease reason of soleplate lengthwise crack on thin-walled girder. It also puts forward a reinforcing skill that is cutting a hole first and then adding transverse ribs to reinforce.
论文深入研究了P.C箱梁出现的底板纵向裂缝的病害原因,并提出通过先开孔,再新增横肋进行加固的加固技术。
参考来源 - P.C箱梁加固技术研究·2,447,543篇论文数据,部分数据来源于NoteExpress
这些特征包括开孔,布线,供热,灯光,供水等等。
These features include apertures, wiring, heat, light, water and so on.
而大多的能量都通过反应器壁的热耗散,或者通过装置开孔的太阳光再发散损失掉了。
Most of the energy is lost through heat loss through the reactor's wall or through the re-radiation of sunlight back through the device's aperture.
可是执行这个办法的最后的一个困难在于站里没有一个人的手臂小到可以伸进这个只有2.5英寸的开孔,他们无法把油脂涂抹到轴承的四周。
The only problem was, nobody at the station had an arm small enough to actually reach in through the two-and-a-half inch opening and pack grease around the bearing.
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