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Completely covered with skins except for a single or double opening in the ''.'center'.'' and propelled by a double-bladed paddle.

中心'。''有一两处开口外全部用皮覆盖，这种划子是用两叶桨推动的

With comparisons to several cases of block double-bottom construction, and on basis of the analyses of block assembly influence factors, the multistage fuzzy comprehensive assessment for double-bottom assembly case is presented.

通过对几种双层底分段建造方案比较，在分析影响选择分段装配方案若干因素的基础上，提出了双层底分段装配方案的多级模糊评判方法。

All circuits which are not confined to one housing and which affect safety shall be double-wire, double-break, except signal and switch indicator light circuits.

所有电路所不局限于一所房屋，影响安全，应双丝双破，除信号指示灯、开关电路。

By analyzing the current researches of high voltage vacuum switch,the necessity and feasibility to research and develop 126 kV double-break vacuum circuit breaker are demonstrated,and some countermeasures are presented against the defects of the conventional double-break vacuum switch.

大连理工大学电气工程与应用电子技术系；许继集团有限公司在分析国内外高电压等级真空开关研究的基础上，提出了研发126 kV双断口真空断路器的必要性和可行性，并针对双断口真空开关存在的缺陷提出了解决措施。

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。

Sui November 2003 "Shanghai amendment to the Town Planning Ordinance," the beginning of the control center and the Shanghai City Real Estate Development "double double-cut increase" policy measures adopted, Shanghai (Pudong-region) in the time before some of over 200 residential projects were suspended due to planning constraints to development issues thaw, the overall volume of these projects are expected in more than 10 million square meters, but mostly concentrated in Link, Link particularly within the vicinity, consider those items listed preparation period (covering 844,000) is estimated at two years, so the project is expected by the end of 2005 and in early 2006 will begin to enter a large number of Shanghai market, when Shanghai residential market downtown areas, the central area Yishoufang supply will show a big increase.

随2003年11月《上海市城市规划条例修正案》和上海开始控制中心城区房地产开发的&双增双减&政策措施的出台，上海市在此时间段之前约200多个住宅项目，由于规划限制被暂缓开发的问题得以解冻，预计这些项目的总体量在1000万平方米以上，而且大多集中在环线以内尤其是内环线附近，考虑这些项目的上市准备期估计在2年左右，故上述项目预计在2005年底及2006年初将开始大批进入上海市场，届时，上海住宅市场的中心区、次中心区一手房供应量会有较大幅度提升。

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。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。