ditch blasting是什么意思

用法例句

And the kinematics analysis was made on the process of ditching and cutting of the ditcher which worked in the same direction of traction.

稻茬田开沟是南方冬闲田大面积推广油菜种植的重要一环,该文采用旋耕弯刀S245作为开沟的主要部件,设计了稻茬田油菜免耕播种机开沟部件结构,并对以顺铣方式工作的开沟切削抛土过程进行运动学分析,建立了旋耕弯刀横向抛土的数学模型,并用matlab7。

The working methods and principles of the ditching machine coming from home and abroad are analyzed and compared in this paper.

本文分析比较了国内外开沟机械的工作方法和原理，结合我国南方现有油菜种植方式及现有小型旋耕机大量使用的现状，比较了前置和后置式开沟方式的优缺点，采用后置式开沟方式设计圆盘式开沟部件，实现油菜种植机械化开沟和覆土。

Field studies were conducted to evaluate the effects of agronomic practices such as rice straw mulches, planting density and ditch depth on control of rape weeds.

研究了稻草覆盖、增加作物种植密度及开沟深度等农作措施对油菜田杂草的控制作用。

The ditching machine is the special engineering equipment in the crag earth final assembly construction, which is widely used for continual ditching operation in engineering construction such as communication electric cable, petroleum pipe line, irrigation and water conservation as well as military.

本文依据大庆石油管理局委托“立式螺旋开沟机研制”项目,对立式螺旋开沟机进行研究。

Aiming these characteristics,the means of exterior gradual ditching and active drainage(EGD&AD), from part to whole,shallow to deep,and by stages to ditch,were used.

针对无锡太湖五里湖地区降雨量较大,环保疏浚堆场底泥粘性强,渗透系数小,自然干化过程缓慢的特性,采用从局部到整体,由浅入深,分期分阶段,表面渐进开沟主动排水的方法,并对开沟后不同情况下堆场干化过程进行研究,分析不同沟渠系统对堆场底泥干化的影响。

The article designs a new type of ditching chain-edaphic and mineral ditching chain with reamer for solving that general ditching chain is difficult to be applied to ditching equipment.

本文为了解决目前普通开沟链条难以适应沟渠开挖设备的工矿问题,设计出一种新型开沟链条—刀式矿土复合型开沟链条,并开创性地提出了在土壤介质链传动过程中便于土壤颗粒移动的一种新式轮夹啮链条的链传动结构框架,而且针对此结构框架提出了链条的两种设计技术方案—相邻相同开沟链条、相间相同开沟链条。

Finally,the simulation design of ditching machine′s operating arm was given as an example of application of virtual prototyping technology.

阐述虚拟样机的先进性及应用软件ADAMS的设计流程,通过多功能开沟机工作臂的仿真设计给出虚拟样机的具体应用。

By designing and computing, we refit the ditching machine to an 8 8 kW walking tractor, and used it on grape farms This ditching machine can ditch as wide as 400 mm, and as deep as 400 mm It s speed can reach 1 km/

通过设计计算 ,将现有的开沟机进行改装 ,使之与 8 8kW手扶拖拉机配套 ,可在狭小空间的葡萄园里使用。

the effects of three profile wheel arrangements in the frontal ,middle and rear positions on the profiling capacity, penetrating angle and depth of furrow opening are studied.

仿形机构是播种机的重要工作机构，在不同仿形机构的理论分析研究中，对仿形轮配置的专门研究却为鲜见，本文集中研究了仿形轮前、中、后三种配置对不同仿形机构的仿形量、入土角、开沟深度的影响。