| 1. | Industrial plate screens - specifications and test methods
工业用金属穿孔板技术要求和检验方法 |
| 2. | Test sieves of perforated metal plate
金属穿孔板试验筛 |
| 3. | Test sieves - technical requirements and testing - test sieves of perforated metal plate
试验筛.技术要求和试验.金属穿孔板试验筛 |
| 4. | Anatomy of the vessel elements and perforation plates in the secondary xylem of casuarina cunninghamiana
细枝木麻黄导管分子及穿孔板解剖学研究 |
| 5. | Test sieves - metal wire cloth , perforated metal plate and electroformed sheet - nominal sizes of opening
金属丝编织网穿孔板和电成型薄板筛孔的基本尺寸 |
| 6. | In addition , the paper presented the influence of different shutter positions to the simple expansion cavity muffler
此外，研究了不同穿孔板位置对简单膨胀腔消声器排气噪声的影响。 |
| 7. | Industrial screens . wowen wire cloth , perforated plate and electroformed sheet . designation and nominal sizes of openings
工业用筛网.金属丝机识布穿孔板和电成型片材.名称和网孔的标称尺寸 |
| 8. | Wood semi - ring - porous ; vessels solitary with angular outline ; perforation plates scalariform ; intervessel pits and vessel - ray pitting opposite or opposite to scalarifonn ; helical thickenings in vessel elements present
梯状穿孔板；管间纹孔式为互列；射线导管间纹孔式多对列，类似导管面间纹孔式。 |
| 9. | At last , the test for the ma60 apu noise with the micro perforated absorber is present in this paper . experiment results show that an obvious reduction has be obtained using this micro perforated absorber
最终将微穿孔板消声器安装到新舟60飞机apu的排气管道上在飞机场进行现场测试，得到了满意的降噪结果。 |
| 10. | It is the propose of this paper to develop a method to reduce the noise level of ma60 apu without more weighting and other infection on airplane . to accomplish this object , a new type of micro perforated absorber is used
针对新舟60飞机apu本身的结构和环境特性，我们采用一种新兴的环保型消声材料-微穿孔板为上要吸声结构完成降噪设计。 |
