Characteristic of Groundwater Drawdown and its Sustainable Development Countermeasure in Minqin Basin

1、

To Determine Critical Water Level by Correlation between Land Subsidence and Groundwater Drawdown

根据地面沉降与地下水头的关系求地面沉降临界水位

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2、

Analysis on Meteorological Contributing Factors of Groundwater Drawdown Funnel in Langfang

廊坊市地下水位下降漏斗的气象成因分析

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3、

The main pollution reasons include the species hydrogeologic conditions, sewage irrigation, landfill of municipal refuse, and regional groundwater drawdown.

最主要的污染原因有：独特的水文地质条件，污灌，砂石坑垃圾回填，及区域地下水位下降。

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4、

The results show that when increasing the wheel load, drawbar pull accordingly increase and the tractive efficiency show downtrend before uptrend.

随着轮齿高度的增加，挂钩牵引力会随之增大，车轮的最大牵引效率有所降低；

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5、

The maximum drawbar pull in earthmoving machinery is the one of main parameters in design and it is limited by the drive slip.

最大牵引力是土方机械设计的主要参数之一，其取决于对土方机械行走系统的滑转率的控制。

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6、

When the drive slip is less than 0.05~ 0.30 percent, the drawbar pull in earth-moving machinery is good.

滑转率在0.05～0.30时，可使土方机械的驱动力达到最佳。

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7、

Drawbar pull-weight ratio

牵引杆拉力-重量比

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8、

The predicting formula of the drawbar pull of driven wheels running on the sand is obtained by model test.

通过模拟试验，得出了驱动轮在砂地上行驶时的挂钩牵引力预测公式。

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9、

The increase of lug height may result in the improvement of drawbar pull and driving efficiency.

增加齿高可以提高牵引力和驱动效率。

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10、

TESTING Experiment and Analysis on Tractor Drawbar Pull Characteristics

拖拉机牵引性能试验分析

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11、

Trailer with adjustable drawbar height

牵引杆高度可调式挂车

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12、

The suitcase body is provided with an adjustable drawbar and roller wheels.

箱体设置有可调拉杆和滚轮。

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13、

Achievements, Problems and Prospects in China's Water Conservancy Construction

中国水利建设的成就问题和展望

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14、

Water Conservancy Construction and Ecological Environment Protection for Sustainable Development

水利工程建设与保护生态环境可持续发展

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15、

Chapter IV, this chapter is mainly analyzed on water conservancy construction and land development.

第四章主要论述宁夏平原的水利建设与土地垦殖情况。

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16、

Chinese traditional water conservancy construction and development is decided has specific geographical conditions.

在环境史视野下研究发现，中国传统农田水利建设与发展是有特定的地理环境决定的。

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17、

On farmland construction of water conservancy works in China

略论我国农田水利基本建设

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18、

Policy about developing technical equipment of water conservancy works

发展水利技术装备的政策思考

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19、

Research on the Techniques and System for 3D Visual Simulation in Water Conservancy Works

水利工程三维可视化仿真技术与系统研究

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20、

Strengthening construction of water conservancy works and rural energy construction;

加强农田水利和农村能源建设；

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