perforation的意思|示意

When held to the light the small oblong leaves are seen to possess tiny perforations.

迎着光看时，就会发现椭圆形小叶子上有微小的孔眼。

柯林斯高阶英语词典

The result shows that the directional perforation formslong and flat fractures easier than the spiral perforation.

研究结果对疏松砂岩储层压裂充填防砂设计具有较大的指导意义.

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Major complications for intestinal bleeding, intestinal perforation.

主要并发症为肠出血 、 肠穿孔.

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Tear the sheet of stamps along the perforations.

沿齿孔把邮票撕开。

牛津词典

Results show that the acoustic system of micro perforation plate can effectively reduce discharge noise.

试验表明,微穿孔板吸声结构可有效地降低排气噪声.

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The relationships among perforation diameter , density, phase and casing strength are clarified.

明确了射孔直径 、 度及相位等与套管强度的关系.

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