defect research and prevention measure of bridge and culvert in severe frigid and frozen soil zone

1、

the communities of picea forest, abies forest and larix forest were separated from frigid coniferous forest zone according to the peak of associated dominant species.

在寒温针叶林带中依据建群种花粉峰值的不同可划分云杉林、冷杉林及红杉林群落。

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2、

study on man-made regeneration technique of alm from secondary succession of dragon spruce and faber fir forest in frigid and temperate zone

寒温带云冷杉林次生演替成亚高山草甸人工更新技术的研究

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3、

the climate in upper dam region of chengde prefecture is that of frigid temperate zone, semi damp grass land and monsoon.

承德坝上地区，属寒温带半湿润草原季风气候，森林草原生态系统脆弱，自我恢复能力较差。

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4、

for example the concrete faced rock-fill dam in frigid zone is distinctive in terms of frost resistance and durability, cushion material seepage prevention and frost heave, adaptability of darn filling with season coordination among construction diversion, flood discharge and the whole construction schedule etc.

如在面板的抗冻耐久性、垫层材料防渗和冻胀特性、坝体填筑与季节的适应性、导流和度汛与总体进度的协调等方面，寒冷地区混凝土面板堆石坝均有其独特之处。

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5、

combined with the climate feature in frigid zone, this paper states that decreasing broken board in construction, improving road surface frost resistance and assure good usage status is the important part of mixing proportion design of cement-concrete road surface.

本文结合寒带地区的气候特点，减少施工过程的断板率，提高路面抗冻耐久性，保证路面良好的使用状态是水泥砼路面配合比设计中的重点。

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6、

after defining the target of the extracting water resource demonstration on bio-mass power cogeneration plant in frigid zone, the strategy and method are explicitly analyzed and summarized.

在明确论证目标的基础上，对基于中水的寒区生物质热电厂取水水源论证的论证思路和方法进行了详细分析、梳理和归纳。

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7、

the upper reaches of the yarlung zangbo river lie in a frigid zone.

雅鲁藏布江的上游是高寒地带。

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8、

study on the variations by the exogenous dna of tropical sorghum introduced into the sorghum of frigid zone

热带高梁外源DNA导入寒带高梁引起变异的研究

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9、

high mountain frigid zone;

高山寒带；

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10、

new integrated techniques on increasing quality and disease resistance of wheat at frigid zone of the mountainous area in xinjiang

山区寒带小麦综合新技术试验

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11、

effect of admixture on impermeability of concrete in frigid zone

引气减水剂对混凝土抗渗性影响的实验研究

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12、

the mechanical model of cutting side slope stability in frigid zone is put forward according to the research above.

在此基础上构建了寒区路堑土质边坡稳定性的力学模型。

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13、

research and application of polyethylene ( pe) fuel gas pipeline in frigid zone

聚乙烯燃气管道在高寒地区的应用与研究

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14、

on quality control of asphalt concrete seepage control face slab in frigid zone

关于高寒地区采用沥青混凝土防渗面板的质量控制

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15、

low speed driving unit for belt conveyor used in frigid zone

高寒地区带式输送机慢速驱动装置

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16、

bumblebee spreads all over the continent besides the south pole and oceania, presents to temperate zone and inferior frigid zone in northern hemisphere normally, adapts to cold, moist climate.

世界上已知的种类有239种，自然分布区域遍及除了南极和大洋洲以外的整个大陆，集中分布于北半球的温带和亚寒带，适应于寒冷、湿润的气候。

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17、

it displays an entire series of plants in vertically ecological distribution, ranging from the tropical zone, temperate zone and frigid zone.

它展示了几乎生态区整个的植物系列，覆盖热带、温带、寒带。

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18、

undifferentiated carcinoma of thyroid gland

甲状腺未分化性癌

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19、

analysis of changes in unappropriated surplus

未支配剩余变动分析表

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20、

unappropriated earned surplus of current period

本期未分配盈余

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