barrier bar

The texture maturity of sandstones is a useful index for identifying the paleogeographic environments. The barrier bar sandstones are of high texture maturity, coast and tidal flat sandstones are of moderate, and lagoon sandstones are of lower.

砂岩结构成熟度可作为判别古地理环境的一个指标，障壁沙坝砂岩结构成熟度高，滨海及潮间坪砂岩结构成熟度中等，泻湖砂岩较差。

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The "Jiapila Formation" consists of carbonate platform tidal-flat ( including tidal channel sand) deposits, barrier bar deposits and mud deposits formed in a hot environment, which contain records of seismic events.

甲丕拉组为干热环境下的碳酸盐台地潮坪（包括潮汐水道砂）沉积、障壁砂坝沉积和滨外粉砂、泥沉积，其中有地震事件记录。

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The result indicates that the object layers are divided into two depositional systems, the barrier seacoast depositional systems are recognized on upper Carboniferous taiyuan phase with tidal flat, lagoon and barrier bar sedimentary deposit.

结果表明，研究区内目的层段可以划分为2个沉积体系：（1）上石炭统太原期为有障壁海岸沉积体系，发育潮坪泻湖障壁砂坝沉积。

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It has three reservoir sands: the barrier bar of Carboniferous Taiyuan Formation, delta-plain distributary channel sand of Permian Shanxi Formation and fluvial facies channel sand of Lower Shihezi Formation. The reservoir sands are low porous, low permeable and tight.

气田具有石炭系太原组障壁沙坝、二叠系山西组三角洲平原分流河道砂和下石盒子组河流相河道砂3套储集体，储集体为低孔、低渗、致密性储层；

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Mountain park is a natural green barrier and natural oxygen bar of a city, It is people away from the noisy cities to find the best place to a piece of pure land.

山地公园是城市的一道天然的绿色屏障和天然的氧吧，是人们离开喧嚣的城市去寻找一片净土的最佳场所。

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The utility model relates to an automatic lifting control circuit for a vehicle barrier bar.

本实用新型涉及一种车辆挡杆自动起落装置。

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