The manhole cover can be traced back to the Rome times, when the cover is made of stone.
井盖最早可追溯至罗马时代，当时的井盖是用石头做成的。
Resin composite manhole cover is made of polymer composite materials, no recovery value.
树脂复合井盖是由高分子复合材料制成，没有任何回收价值。
But need to note is a hardness up, its toughness is to catch up, this can be a good iron manhole cover.
但需要注意一点就是硬度跟上了，其韧性也要跟上，这样才能算是好的铸铁井盖。
The utility model relates to the improvement on a manhole cover with an iron skeleton concrete structure.
本实用新型是对铁骨架混凝土结构下水道井盖的改进。
As Rubens' car drove over the manhole cover, the cover was spun up and hit the rear left wheel, causing failure.
当鲁宾斯的车驶过井盖时，井盖向上旋起碰到左后轮，造成碰撞事故。
A manhole cover hoisting tool with pulley structure is designed, including base parts, support parts and pulling parts.
设计了一种滑轮式井盖提升工具，包括底座部分、支撑部分和提升部分等。
The main cast iron manhole cover is being applied in the sewers of the city, but the cause of quality problems in what factors?
铸铁井盖主要是被应用在城市下水道中，但造成其质量问题的因素在哪些？
What the SMC really is known for though is the architecture and development of The Bund, which is where we stumbled over this manhole cover.
工部局因外滩的建设和开发而闻名，而我们也是在那里发现的这块井盖。
However, because of the manhole cover and the manhole covers are different, so when installing some considerations are also indispensable.
不过，由于这种井盖与普通的井盖有着一定的差异，所以在安装的时候一些注意事项也不可缺少。
This kind of resin composite manhole cover with glass fiber and resin as the basic material, curing agent, accelerator as auxiliary material.
这种树脂复合型井盖以玻璃纤维和树脂为基本材料，以固化剂、促进剂等为辅助材料制成。
Load and impact strength test, found that this covers the load of 24 tons, the impact strength is higher than that of conventional manhole cover.
载荷和抗冲击强度试验，发现这种井盖的载荷力为24吨，抗冲击强度也超过了普通井盖。
Now he is also the butt of a local joke, which encourages you to "look at the Duke from the luyk (manhole cover)", located to the left of the statue.
现在他还是本地的笑柄，这个笑话是鼓励人们去雕像左侧的下水道的盖子上看公爵。
The utility model relates to a theft-proof manhole cover for the manhole mouth of underground institution, comprising a manhole cover seat and a manhole cover.
本实用新型涉及一种用于地下公共设施井口的防盗井盖。
Such a widely learning awareness has turned to be a living habit—For example, just the colorful manhole cover has become the investigating experience in Lihui's "Moments".
这种“博采众长”的学习意识，甚至变成了生活习惯——比如米兰街头的五彩窨井盖，都变成李晖“朋友圈”里的一组考察心得。
On a number of occasions it is not surprising to see the manhole cover completely missing so that if you land a wheel in there it has to be goodbye to your front suspension.
在不同场合也并非令人惊讶地看到井盖完全缺少这样如果你的土地上还有一个车轮便要告别你的前悬挂。
Is mainly the size effect and solidification, shrinkage, stress and other issues clearly, to avoid or reduce the segregation, iron manhole cover deformation and crack defects.
主要是明显的尺寸效应和凝固、收缩、应力等问题，避免或减少铸铁井盖的成分偏析、变形、开裂等缺陷的产生。
Emergency vent Manhole Cover is a kind of rapid relief-pressure device. Its technical performance, main material and main parts'materialare the same as HXF-HR type breather manholes.
紧急放空人孔是快速泄压装置，其技术性能、主要零部件材料与HXF-HR呼吸人孔相同。
Its construction is divided into two parts, one is the lower part of the manhole cover, ensure that the level of it, it needs to be placed in the asphalt material, dealing with rigid cap.
它的施工分为两个部分，一是沙井盖下部部分，保证它的水平性，它需要被安置在沥青材料上，做好刚性盖的处理。
The new ductile iron manhole cover is arranged on a support seat on the embedded strip, so when the vehicle passes in the top cover, reduce the overall vibration, effectively prevent noise.
新式球墨铸铁井盖在支座上装上了嵌入式胶条，这样在盖板上方有车辆经过的时候，会减少整体的震动，有效防止响声。
The new ductile iron manhole cover is arranged on a support seat on the embedded strip, so when the vehicle passes in the top cover, reduce the overall vibration, effectively prevent noise.
新式球墨铸铁井盖在支座上装上了嵌入式胶条，这样在盖板上方有车辆经过的时候，会减少整体的震动，有效防止响声。
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