查询词典 ballast

Stone ballast plays an important role in ballasted truck of railway. Ballast density and resistance are an important parameter for the analysis of track structure and it has close relations with rapid deterioration of the quality of the track geometry as well as the amount of work in railway track maintenance.

碎石道床是铁路有碴轨道结构的重要组成部分，其道床密实度、道床纵、横向阻力不仅是轨道结构分析的重要参数，并且与轨道几何形位劣化和轨道养护维修工作量有密切关系。

Pump out ballast water in ballast tanks.

排压载水舱的压载水。

Choose one ballast tank and record the time needed for filling /emptying fully when ballast pump running.

结合泵的运转，对各压载舱进行注水和排水效用试验。

The each ballast pump can serve for all ballast tanks.

心泵。此3 个压载管彼此相连，其目的是让每一个压载泵能服务于所有的压载舱。

The charge pump electronic ballast circuit which employs a charging capacitor and a high frequency AC source to implement the power factor correctionhas become an attractive topology for the ballast of the fluorescent lamp.

电荷泵式电子镇流器，采用充电电容和高频交流源，以实现功率因数校正，这已成为荧光灯镇流器中极有吸引力的电路拓扑。

In the original ballast promotes the pump house CompactLogix control system and east auxiliary constructs in the area pump house ControlLogix control system's foundation to use the ControlNet networking, through RSLogix 5000, RSVIEW32 software's establishment, the edition, realizes the ballast to promote the pump house the remote control, achieves the enhancement production efficiency, convenient equipment monitoring, maintenance goal.

摘 要：在原压舱水提升泵房CompactLogix控制系统和东辅建区泵房ControlLogix控制系统的基础上使用ControlNet网络技术，通过RSLogix 5000、RSVIEW32软件的设置、编辑，实现压舱水提升泵房的远程控制，达到提高生产效率，方便设备监控、维护的目的。

The charge pump electronic ballast circuit which employs a charging capacitor and a high frequency AC source to implement the power factor correctionhas become an attractive topology for the ballast of the fluorescent lamp.

西安无线电二厂，陕西西安710016）摘要：电荷泵式电子镇流器，采用充电电容和高频交流源，以实现功率因数校正，这已成为荧光灯镇流器中极有吸引力的电路拓扑。

Sichuan province is rich in building stone resources for ballast. Strengthening exploration and assessment of the building stone resources for ballast will provide a solid material foundation for train speeding in Sichuan.

市场需求迫切，容量空间巨大，我省此类石材资源具有量大、质优、区位分布合理等优势，应重视和加强铁路道碴石材资源的勘查评价，为四川铁路的全面提速，提供坚实的物质基础。

Using theory of strength of track structure and vehicle-track coupling vibration dynamic model, we analyze the effects the different thickness of ballast act on relevant track structure parts and deduce the rational thickness of ballast.

本文应用轨道结构强度计算理论及车辆－轨道耦合振动动力学仿真计算模型，分析了不同道床厚度对相关轨道结构部件的影响，得出了合理道床厚度的建议值。

With the speed of trains running continuously improve, the ballast track ballast of the powder, bed and the cumulative result to speed up the rate of deformation, it is necessary to strengthen the track structure and frequent maintenance work to meet the high-speed railway line on the high ride comfort, stability Requirements.

随着列车运行速度不断提高，有碴轨道的道碴粉化及道床累积变形的速率随之加快，必须通过轨道结构强化及频繁的养护维修工作来满足高速铁路对线路高平顺性、稳定性的要求。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。