穿孔：在保持架部门的第四步工序。同时按要求在切出保持架兜孔，维持合适的尺寸。
PERFORATOR: Fourth stage of operation in the cage department. Simultaneously cuts out all pockets required in blank, maintaining proper top dimensions.
研究表明：穿孔板的声阻与孔板厚度、孔径、穿孔数目、声波频率和气流速度等因素有关。
The experimental results show that acoustic resistance of perforated plate is related to plate thickness, aperture diameter, numbers of aperture, acoustic frequency and airflow velocity.
凸耳阀门可规定采用螺纹孔螺栓连接或贯穿孔螺栓连接。
Lug valves can be specified with threaded or thru-hole bolting.
实验结果表明，水平连铸管坯的塑性比轧制管坯差，斜轧穿孔时水平连铸管坯形成孔腔的可能性比轧制管坯大得多。
The result shows that it is more possible for the HCC billet to form the cavity than the rolled bloom in rotary piercing operation owing to the former's plasticity less than the latter's.
用塔形试样对比研究了水平连铸管坯和轧制管坯穿孔时顶头前压缩率对孔腔形成的影响。
The effect by pre-plug compression rate on formation of the cavity was investigated in a comparative method with step-down test samples of HCC billet and rolled bloom respectively.
各支架上设有多个接合槽孔及贯穿孔，T形支架与短t形固定片的腹腔板设有扣钩相扣合。
The supports have slotted notches and through holes. The webs of T-shaped support and short T-shaped fixing piece have cramp hooks.
底座封闭于槽孔，其顶面中央设有供掣动件及抗扭弹簧套设的凸轴，并设有供以热熔性固着剂固定钢珠的穿孔；
The center of the braking piece is provided with the through hole which is sheathed on the convex shaft and the top face is provided with an upright shifting piece.
一种输入装置，它读取或检测穿孔卡上的孔，把以孔的模式表示的数据转换成电信号。
A card punched accidentally or intentionally with holes in excess of the hole patterns of the character set used.
一种散热鳍片穿孔涂布工具及涂布方法，该工具为一灌入有导热介质的 中空管体，而在管体的一端周缘上设有数个出料孔，并在邻近该出料孔的下 方周缘处环设有具弹性的刮板；
The related perforating coating tool for a heat-conducting fin comprises: a hollow tube filled with conductive medium, some discharge holes on one end of the tube, and a spring scraper under the hole.
多少的贯穿孔与引脚比例是最佳的通孔填充？
导管分子很短，单穿孔，无穿孔的输水分子具单纹孔；
Tracheal element is very short, sheet is perforative, have odd grain opening without perforative element is defeated by water;
结果茵陈蒿具有梯纹、网纹和孔纹3种类型的导管，穿孔板类型为单穿孔。
Results There were 3 types of vessel elements, scalariform vessel, reticulated vessel and pitted vessel, the perforation plates were simple perforation plate.
结果茵陈蒿具有梯纹、网纹和孔纹3种类型的导管，穿孔板类型为单穿孔。
Results There were 3 types of vessel elements, scalariform vessel, reticulated vessel and pitted vessel, the perforation plates were simple perforation plate.
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