查询词典 helical

The steam generator, in the incorporate type of the high-temperature gas-cooled reactor, should be of the compact structure, the least heating surface and the higher power density in order to decrease the volume of the initial-stress concrete pressure vessel, there by the steam generator with the uniflow multi-start helical coiled tubes is used generally for it possessing all these characteristics.

在采用一体化布置的高温气冷堆中，为了使预应力混凝土压力容器体积不致过大，蒸汽发生器应尽量紧凑，严格限制受热面空间布置，并要求其具有较高的功率密度。因此，一体化布置的高温气冷反应堆主要选用直流型多头螺旋管式蒸汽发生器。

The steam generator, in the incorporate type of the high-temperature gas-cooled reactor, should be of the compact structure, the least heating surface and the higher power density in order to decrease the volume of the initial-stress concrete pressure vessel, there by the steam generator with the uniflow multi-start helical coiled tubes is used generally for it possessing all these characteristics.

资料为硕士论文，包括完整计算过程，及相关设计图纸，推荐下载！摘要在采用一体化布置的高温气冷堆中，为了使预应力混凝土压力容器体积不致过大，蒸汽发生器应尽量紧凑，严格限制受热面空间布置，并要求其具有较高的功率密度。因此，一体化布置的高温气冷反应堆主要选用直流型多头螺旋管式蒸汽发生器。

The fibrils of three levels,Which were macrofibrils of several tens micron in diameter,fibrils feW micron and microfibrils about 0.3 micron,were observed simultaneously with banded texture usingpolarized microscope.After annealing,fibrils in different levels relaxed to differentmorphology.Macrofibrils still oriented along shear direction,but fibrils relaxed to helical form,and microfibrils relaxed to waveform therefore the banded texture canbe seen.The smaller the diameter of fibrils was,the more easily the fibrils relaxed.Ori the other hand,the banded texture decoration of annealed unoriented filmsrevealed directly the distribution of directors within and out of domains and thevariation of directors on boundaries.

微纤分三个层次，即直径分别为数十微米的微纤束、数微米的微纤和0.3微米的亚微纤，退火后三个层次的微纤松弛成不同的形态，微纤束仍笔直沿剪切方向取向，微纤松弛成螺旋形，而亚微纤松弛成波浪形从而观察到条带织构：微纤直径越小越易松弛，另一方面，非取向态织构退火后由亚微纤形成的条带装饰结果直观地揭示了微区内外分子指向矢的分布和它们在边界上的变化。

Because of having surplus weld reinforcement height and irregular seam form as well as the influences of polyethylene raw materials and coating process, the quality problems of ununiformity in thickness of 3PE coating and coating thickness reduction on helical seam occur.

由于螺旋埋弧焊管存在焊缝余高超高和焊缝形貌不规整等现象，加之聚乙烯原材料及涂敷工艺等因素的影响，会使三层PE防腐涂层出现涂层厚度不均、焊缝处涂层减薄等质量问题。

Abstract］ Objective To diagnose negative ureterolith with 3D reconstruction of multi-slice helical CT.

目的 应用多层螺旋CT的三维重建诊断阴性输尿管结石。

Results 19 of 20 cases displayed negative ureterolith throuth miltis-lice helical CT with MIP and SSD of 3D.1 case was only uretero-narrow withoutstone.

结果 20例输尿管阴性结石患者CT扫描，并用最密度投影和表面遮盖法重建，19例满意显示输尿管结石，1例输尿管下端炎症狭窄，未显示结石。

High accuracy for the detection of nephrolithiasis and ureterolithiasis is obtained and the radiation dose significantly decreased by using unenhanced 16-detector helical CT performed at a reduced tube current of 60mAs for the patients less than 90 kg.

对于体重＜90kg的病人，在16层螺旋CT，管电流为60mAS的低剂量平扫诊断肾及输尿管结石能够获得高的准确率，并且明显降低病人的放射剂量。

Methods Sixty-five patients with suspected nephrolithiasis and ureterolithiasis were collected. Followed by standard-dose helical CT scans with 2-mm-thick section, 120kv, 160mAs, low-dose scan was carried out with the tube current reduced to 60mAs. All other technical parameters and anatomic coverage remained constant.

收集65例临床拟诊肾及输尿管结石病例，每一病例在常规标准剂量(120KV， 160mAs)扫描后再行低剂量扫描，在低剂量扫描中，管电流下降到60mAs，其余参数及扫描范围均保持不变。

The intravenous urogram, B-mode ultrasonogram, and helical CT feature of the urinary stones ('sandy uroliths') in goats by feeding high level cottonseed meals diet were observed.

对饲喂棉饼诱发的山羊泌尿系统结石的病例进行了静脉尿路造影X射线、B超、螺旋CT检查。

METHODS: Differences of the vasodilating action of Ipt in big artery and small artery were studied using isolated rat tai l artery helical strips and aortic rings, and the effects of Ipt on potassium cu rrents in smooth muscle cells derived from rat tail artery were observed by usin g patch clamp technique.

采用大鼠尾动脉螺旋状血管条和主动脉离体血管环两种组织，对比观察盐酸埃他卡林对大、小动脉扩张作用的药理学特性，并且利用膜片钳技术观察盐酸埃他卡林对大鼠尾动脉平滑肌细胞钾电流的影响。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失