trapdoor是什么意思

网络释义

用法例句

Research on the steel fiber reinforced concrete with high strength used for thin manhole cover;

钢纤维高强混凝土薄型下水井盖板的材料研究

The polymer matrix composites manhole cover the article focused on is a structure with word ″#″,the static of manhole cover is analyzed by software of ANSYS finite element system,the static performance parameter of manhole cover is obtained,the analysis results indicate that the design of manhole cover structure is available,it can satisfy the requirement in practice.

研究的聚合物基复合材料检查井盖呈井字型结构,利用ANSYS软件对井盖进行静力学分析,得出了井盖的静态性能参数。

s: The manhole cover made of cast iron in municipal engineering is often stolen,so many manhole covers guarding against theft are developed.

市政工程中井盖的经常被盗已成为一种社会公害,因此研究和开发具有防盗功能的井盖就引起了社会各界越来越多的关注。

The present status of composite well lids was introduced.

本文介绍了复合材料井盖的现状 ,分析比较了三种复合材料井盖 (钢纤维混凝土井盖、再生树脂复合材料井盖和FRP井盖 )的优劣 ,并展望了复合材料井盖的发展趋势。

This article,after introducing manhole cover designs of Japan and some European and American countries,looks at the problems and present conditions of manhole covers in our urban layout and.

本文介绍了欧美国家及日本的城市窨井盖创意思路,剖析了我国城市规划中窨井盖设计的问题及现状,提出了在保证窨井盖实现其市政设施功能的同时,赋予其更多的功能,如:指示路标功能、广告宣传功能、传承地方文化功能等。

The article elementarily analyzes the characteristics of the high-performance composite concrete manhole cover.

浅析高性能复合混凝土窨井盖的特点,用环保、节能、科技型的窨井盖来取代传统的铸铁窨井盖,解决城市道路陷阱、黑洞等老大难问题。

He planked the well over.

他用木板把井盖上。

But once the prince was in the well, the servant closed its lid and called out.

但当王子下井后，仆人就关上了井盖，并大声叫道。

Study on the BMC Techniques of Manhole Cover Made by Printed Circuit Board (PCB) Crushing Scraps;

电路板回收粉料作BMC窨井盖原料研究

Public Facility in Chongqing Review on Visual Design of Manhole Cover

重庆公共设施之窨井盖视觉设计研究

Analysis on the Reasons of Damaging the Pavement around the Inspection Well and Study of a New Manhole Cover

道路检查井“烂边”病因分析及新型井盖的研制应用

Here's the question: Why are manhole covers round?

这个问题是：为什么下水道井盖都是圆的？

Top-Down Construction Technique for Excavation of Working Shaft Cover of TSM in Shanghai Subway Station

上海地铁车站盾构工作井盖挖逆作施工技术

The Study for Damage of Manhole Covers in a Road

某主干道上检修井盖断裂破坏理论研究

In the research of the influencing factor of the stressed performance of the steel fiber concrete well cover

钢纤维混凝土井盖力学性能影响因素研究

After opening the well-cover to begin lowering the bucket he paused and leant with his forehead and arms against the framework.

他揭开井盖儿，要往井里顺公用水桶的时候，停了一下，把额和胳膊靠在辘轳架上。

But once the prince was in the well, the servant closed its lid and called out. " I am cast out because of you.

但当王子下井后，仆人就关上了井盖，并大声叫道：“我是因为你才被放逐的。

The people authorized to open manhole covers could easily be trained to do it safely.

专业人员经过简单的培训就可以做到安全的打开井盖。

PPS covers, plastic pipes pieces, plastic products manufacturing sales; Control of the watercourse, fittings wholesale, retail.

PPS井盖、塑料管件、塑料制品制造销售；水道管件、洁具批发、零售。

SMC/DMC molded products: Widely used in electrical field such as bus bar clamp.

广泛地适用于电器制品，防眩板，母线夹，电表箱，井盖等制品。

A fitted covering used to seal a well or large pipe.

封闭盖用以封闭井或大管子的盖子

"If a man makes a hole in the earth without covering it up, and an ox or an ass dropping into it comes to its death;"

人若敞着井口，或挖井不遮盖，有牛或驴掉在里头，

The design and analysis of the reinforced concrete phreatic beam floor

钢筋混凝土井字梁楼盖的分析和设计

"and a woman put a cover over the hole, and put crushed grain on top of it, and no one had any knowledge of it."

那家的妇人用盖盖上井口，又在上头铺上碎麦，事就没有泄漏。