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Steel tubing in different shapes corrugated steel pipe can be divided into different types of pipe-shaped, conical shaped steel tube, steel tube shaped melon-shaped, double-concave profiled steel, double-convex shaped steel tube, profiled steel five plum-shaped, hexagonal shaped equilateral steel, semi-circular special steel round, steel octagonal shaped, diamond-shaped steel, hexagonal shaped steel tube, steel triangular shaped, oval shaped steel tube.

钢管异型管可分为波纹形异型钢管、圆锥形异型钢管、瓜子形异型钢管、双凹形异型钢管、双凸形异型钢管、五瓣梅花形异型钢管、不等边六角形异型钢管、半圆形异型钢圆、八角形异型钢管、菱形异型钢管、六角形异型钢管、三角形异型钢管、椭圆形异型钢管。

The mechanical parking equipment with double-decked elevator and double berth roller deposit table is reasonable and simple in structure, and high in efficiency.

双层搬运器双车位滚道存放型机械式停车设备结构简单合理，存取车运行效率高。

This paper describes and compares 4 streamtube models (single-disk single-streamtube, double-disk single-streamtube, single-disk multi-streamtube and double-disk multi-streamtube models) based on the momentum theory for the hydrodynamic performance prediction of the vertical-axis variable-pitch turbine that may be employed to tap tidal stream energy resources, especially for the prediction of the overall turbine power coefficient.

以潮流发电水轮机的设计为研究背景，分析和总结了基于动量定理方法的四种流管模型(单盘面-单流管模型、双盘面-单流管模型、单盘面-多流管模型和双盘面-多流管模型)在竖轴变攻角水轮机的水动力性能计算中的应用，特别是能量利用率预报方面的应用。

Normal control group: the ordinary diet, double distilled water; model control group: low-iodine diet, double-distilled water.

正常对照组：普通饮食，双蒸水；模型对照组：低碘饮食，双蒸水。

Do not do plastic surgery will be able to make single eyelids become double-fold, the most direct way is to use double fold tool.

不去做整形手术就能让单眼皮变双眼皮，最直接的方法就是利用双眼皮工具。

After analyzing the numerical simulation results of the impeller blade with different scale, and comparing the flow field distributing, then one kind of double-head anti-unsymmetrical S mode airfoils is found which is suitable to the normal and the reversed blowing for double directions under the design operating condition and which can also satisfy the requirement for the reversible axial flow fan in subway.

分析缩放比例不同的可逆式轴流风机叶型的数值模拟结果，比较各种叶型的流场分布规律，寻找到一种适合于设计工况下正、反双向吹风的双头双机翼反向不对称S型叶型，能够满足地铁用可逆轴流风机的要求。

Our main products are laminating line, insulating line, bending furnaces, straight-edge beveling machine, straight-edge grinding machine, shaped glass grinding machine, double-edge grinding machine, double-head profiling grinding machine, drying machine, washing and drying machine, large size tempered glass homogenizing furnace, sucker lifting devices and so on.

公司开发引进国际先进技术，生产、制造了技术性能可靠，质量一流的玻璃深加工设备及相关产品，促进和推动了我国玻璃深加工事业的发展。公司目前主要生产的玻璃深加工设备有：玻璃夹层生产线、双边磨、自动仿形磨边机、清洗干燥机、大型化学钢化炉、均质炉、吸盘吊架等多种玻璃深加工机械。

Our main products are laminating line, insulating line, bending furnaces, straight-edge beveling machine, straight-edge grinding machine, shaped glass grinding machine, double-edge grinding machine, double-head profiling grinding machine, drying machine, washing and drying machine, large size tempered glass homogenizing furnace, sucker lifting devices and so on.

公司目前主要生产的玻璃深加工设备有：玻璃夹层生产线、双边磨、自动仿形磨边机、清洗干燥机、大型化学钢化炉、均质炉、吸盘吊架等多种玻璃深加工机械。

The compressibility of single-line method is smaller than that of double-line method for lower initial moisture content, and is larger than that of double-line method for higher initial moisture content.

根据试验结果，总结出了黄土的压缩变形随饱和度变化的规律，发现无论单线法还是双线法，黄土的压缩性均随增湿而提高，随减湿而降低。

The Great Yangtze River Bridge of Nanjing is the first double-decker and double-line dual-use bridge of road and railway designed by China itself.

南京长江大桥是中国第一座自己设计建造的双层双线公路、铁路两用大桥。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。