valve pit

It is of significance to the researches and application of pits in foundation-pit retaining.

对软土地基坑中坑支护设计计算深度的取值进行了探讨。

Research on the Process of Micro-pits on the Cylinder Surface by CNC Machine Tool;

数控加工缸套工作表面微坑的方法研究

The Principle of Impacting to Manufacture Micro-Pits and Fixing on Parameter of the Micro-Pits Structure;

振动冲击微坑加工原理及微坑结构参数的确定

Fabrication method of micro-pits is proposed in this paper by using micro-ECM with multiple cylindrical micro-electrodes.

降低发动机的机械损失一直是研究热点,在摩擦副表面加工微坑,作为改善滑动摩擦的方法已引起了研究者的重视。

Review of heat transfer enhancement for dimpled surface;

凹坑强化传热的研究进展回顾

Influence of dimple space on heat transfer enhancement and pressure loss in a dimpled rectangular channel

间距对凹坑强化传热和流动阻力的影响

The application shows that the optimization can greatly reduce the dimple magnitude and improve the punching quality.

实践证明:优化后的凸模在很大程度上减小了凹坑的塌陷量,提高了产品质量。

Structural Feafure and Coal-controlling Effects in Zhangping Xukeng Coal Mine of Fujian;

福建省漳平市许坑煤矿区构造特征与控煤作用

Marked by pits.

有坑洼的，有坑洞的

Fill in sunken places with stones

用石块填平坑坑洼洼

ventilation and drainage of exploratory tunnel

坑探勘探坑道通风排水

Mind the holes in the road.

当心路上的坑坑洼洼。

On Excavation Construction Technique of Soft Soil Foundation Pit with Super Deep Foundation "Pit-in-pit"

带有超深坑中坑的软土基坑挖土施工技术

RESEARCH ON EXCAVATION DEFORMATION CAUSED BY SOIL REINFORCEMENT OUTSIDE EXCAVATION IN SOFT SOIL

软土基坑坑外加固对基坑变形的影响分析

Eleven, twelve, dig a dale.

十一，十二，挖个坑。

surveyor's level

(矿坑)测量水准器

Effectiveness is a habit; that is a complex of practices.

⒆坑谐尚?且恢窒肮

First, I'll make a hole.

首先，我要挖个坑。

They journeyed through rough and miry ways.

他们走的是坑坑洼洼，满是泥泞的路。

The car bounced over the potholes.

汽车在坑坑洼洼中晃来晃去

Place where animals go to wallow

(动物常去打滚的)泥坑,水坑

Artillery cratered the road.

大炮把路面轰得坑坑洼洼。

This rough track will soon is a metalled road.

这条坑坑 的路不久就要铺上碎石了.

The pitprops are strong enough to bear up the weight of the roof.

坑柱很牢固，顶得住坑顶的重压。

A hole or pit, especially one in a road surface.

坑洞尤指路面上的涡穴或坑洞

Tin mining had left the peninsula rather like the craters of the moon.

锡矿的开发使这半岛城市搞得坑坑洼洼，配似月球坑地。