| 1. | and none exposure control group with their chorionic villi also collected by curettage. Single stranded and double stranded breaks in DNA of villus cells in all cases were quantitated by spectrophotometry and using 32 P labeled Alu probe for dot blotting hybridization. |
| 取绒毛组织后 ,以紫外分光光度法和3 2 P标记Alu探针打点杂交法定量检测绒毛细胞DNA单、双链断裂。 |
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| 2. | Double side probe plates:Test pads can bespread on both sides of PCB for convenient PCB layout. |
| 上下针板结构：测试点可双面选点，方便电路板布线设计。 |
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| 3. | Failure causes of double clip reed were analyzed by means of optical microscopy, scanning electron microscopy, electron probe microanalysis and micro hardness tester. |
| 采用光学金相、描电镜、子探针成分分析和显微硬度测定等方法分析了双卡簧片非正常断裂的原因。 |
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| 4. | double bulb-ended probe |
| 双球头探针 |
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| 5. | double probe system |
| 双探针系统 |
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| 6. | Double crystal probe |
| 双晶片探头 |
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| 7. | Double probe technique |
| 双探头法 |
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