【摘 要】
:
渡槽是灌区中一种主要的输水建筑物.设计修建渡槽工程,首先应使之安全可靠,然后再力求工程造价低,施工期限短,灌溉效益大,管理运用方便等.但有些渡槽工程没有注意安全、可靠
论文部分内容阅读
渡槽是灌区中一种主要的输水建筑物.设计修建渡槽工程,首先应使之安全可靠,然后再力求工程造价低,施工期限短,灌溉效益大,管理运用方便等.但有些渡槽工程没有注意安全、可靠的要求,因而有的在施工中,有的在运行期间,发生破损事故.
Aqueduct is a kind of main water conveyance structure in the irrigation area.Design and construction of aqueduct should be made safe and reliable firstly, and then try to make the project cost low, the construction period is short, the irrigation benefit is large, the management is convenient and so on.However, some aqueduct projects do not have Pay attention to safe and reliable requirements, so some are in construction, and some are damaged during operation.
其他文献
摩托车在行驶中,驾驶员两手轻轻握把,车辆能保持直线行驶,并感受两手受力均匀,这说明该车的行驶直线性好。若驾驶员感到要用较大的力把握方向才能使车辆直线行驶,稍一松手就
探讨了唾液酸化的路易斯寡糖 X(sialylLewis X ,SLeX)抗原 ,CD4 4v6和E 上皮钙粘附素 (E cadherin,ED)表达与乳腺癌临床病理生物学行为的关系。应用免疫组化法 ,对 94例乳腺
一辆新东风车运行一万多公里后,左后制动蹄片极易碎裂,只要行驶数百公里,一付好端端的新蹄片就四分五裂了,驾驶员叫苦不迭,事出何因呢?经检查,我们首先发现曾有人在轮毂内轴
After a sluggish market in 1994, both the sale and the production of automobiles will be raised constantly in China, especially in the second half of 1995. In
A series of novel 3-aryl-6-(1,1’-biphenyl-4-yl)-7H-1,2,4-triazolothiadiazines was synthesized by means of the reactions between 3-aryl-4-amino-5-mercapto-1,2,4
The morphological change of St/DVB crosslinked gels during chloromethylation was studied by fluorescence spectroscopy using St/DVB crosslinked and hypercrosslin
A new kind of polyorganozircosilazane as Si/Zr/C/N-based ceramic precursor was synthesized from the condensation reaction of hexamethylcyclotrisilazane lithium
An electrochemical method for determination of horseradish peroxidase (HRP) was developed using a capillary catalytic system. HRP can be measured in several mi
Bayer材料科学公司计划在德国Dormagen-Uerdingen地区新建一套甲苯二异氰酸酯(TDI)装置。新装置产能为300 kt/a,将替代德国Dormagen和Brunsb櫣ttel地区现有的TDI装置。Bayer
Ducati 916(图1)有着前卫的红色车身,体现出意大利摩托车的风范和线条美。将那台赢得世界超级摩托车赛三项锦标的引擎加以扩大和改良,配以设计独到的底盘和一流的悬挂,再加