查询词典 rock-bottom

In actual operation of drill rig, premature damages of rock drill occur frequently, while the situations of damage are not the same due to different rock drill manufacturers.

在凿岩台车的实际使用过程中，凿岩机过早损坏的现象经常发生，但由于凿岩机的制造商不同，损坏的情况也不尽相同。

In this dissertation the analysis of the hydraulic rock breaker and rock drill at home and abroad leads to an return oil chamber of a new hydraulic impactor.

液压冲击器是液压凿岩机和液压碎石机主要执行机构，设计的好坏直接影响到液压凿岩机和液压碎石机的性能。

YDTJ1 Self-propelled Rock Drilling Wagon is one of a series of products developed on the basis of YDT31 New Type Electric Rock Drill.

YDTJ1型机动式凿岩车是在YDT31型电动凿岩机基础上发展起来的系列产品之一。

The field test of GF20D tools to drill moderate hard rock and hard rock showed that under the same conditions,the GF20D is at the top of similar products.

并且选择了适应于中硬、硬岩层使用的合金牌号GF20D进行现场试验，结果表明：在相同的使用条件下，牌号为GF20D的新型凿岩用硬质合金的材质达到国内外同类产品的先进水平。

The rock drill fit for dry and wet drilling in medium hard or hard rock, bore and blasting operation.

手持式凿岩机适用于中硬或坚硬岩石的干式和湿式凿岩、钻孔和破碎作业。

Cao Yushu total right to build wells at coal mine near a period of construction work to be fully affirmed the work of the next stage of requirements: First, be aware of Coal Mine Safety Elm Well the importance of pre-production and further enhance the sense of responsibility and sense of mission , we must bear in mind the "second pioneering" historical mission, to take more effective and more practical methods of work, the scientific arrangement of the work, carefully organize construction work, the remaining project duration inverted one by one to ensure that mine pre-production schedule; second, is necessary to study the construction process to solve difficulties and problems arise, focus on strengthening the soft rock supporting and construction process of research, trial and error comparison, mine worked out well for Elm soft rock supporting a new road.

曹总对榆树井煤矿筹建处近一时期的矿井建设工作予以了充分肯定，并对下一步的工作提出了要求：一是要认识榆树井煤矿安全试生产的重要意义，进一步增强责任感和使命感，要牢记肩负的"二次创业"历史使命，采取更加有效、更加务实的工作方法，科学安排各项工作，精心组织施工，对剩余工程逐项倒排工期，确保矿井按期试生产；二是要及时研究解决施工过程中出现的困难和问题，重点加强对软岩支护和施工工艺的研究，反复试验比较，摸索出适合榆树井煤矿软岩支护的新路子。

It is a great rock or cliff on the loneliest part of the mountains, and, from the flowering vines which clamber about it, and the wild flowers which abound in its neighborhood, is known by the name of the Garden Rock.

这是一个伟大的岩石或悬崖上的山孤独的一部分，从它爬上约花藤，和野生花卉在其附近的比比皆是，是由花园岩石的名称命名。

Maintenance Guangzhou Rock wool lines and relative equipment; Knew well Panel system equipment and back up Rock wool PLC engineer.

维护广州岩棉生产线和相关设备；熟悉并做好天花板生产线PLC工程师的后备工作。

Ship manufacturing requires rock wool products with special properties. Jun Lian brand rock wool products are widely used in exported ship made in China.

造船业使用的岩棉制品各项指标比一般岩棉制品高，君莲牌岩棉制品经过特别的加工，被广泛应用于中国出口船舶制造。

In this paper mainly predictive expressions for porous materials are described.The thermal conductivities of rock wool and calcium silicate insulating materials havebeen calculated by these expressions,however,it has been found that there is somedeviation of calculated values from measured data for these insulating materialscontaining structural water.The effect of the structural water on thermal conductivityhas been studied by means of TG-DTA curves of rock wool and calcium silicateinsulating materials,and...

本文介绍了预测多孔材料导热系数的主要计算方程，通过岩棉保温材料和微孔硅酸钙保温材料导热系数的预测，指出这些方法在预测含有结构水的微孔硅酸钙保温材料导热系数时，与实测值会有较大的偏差，进而利用岩棉和微孔硅酸钙保温材料热重和差热曲线，研究了材料结构水对其导热系数的影响，提出了预测含有结构水的多孔材料导热系数的修正方法，其结果与实测值相当吻合。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。