查询词典 low-grade

Exploratory study was made on the Guanting reservoir influent treatment by using two-stage BAF at extreme low temperature.The results show that the removal of organics and ammonia nitrogen is seriously inhibited due to low temperature,and the conversion of nitrite into nitrate is no longer a limiting factor of complete nitrification.One possible hypothesis is that the activity of nitrobacter is hi gher than that of nitrosomonas at extreme low temperature.

摘 要：两级曝气生物滤池在极低温度下(1℃以下)处理官厅水库入库水的探索性研究试验结果表明，有机物和氨氮的去除受到了低温的严重抑制，亚硝酸盐转化成硝酸盐不再是完全硝化反应的限制步骤，这可能是在极低温度条件下硝酸菌的活性高于亚硝酸菌活性的缘故。

Company and the Chinese Academy of Sciences Institute of Chemistry, Nanjing University of Technology Institute of Chemical Technology has a good technical cooperation, product quality can meet the needs of different customer requirements, in particular, high content, low-arsenic, low lead, low-iron phosphorus trichloride, oxychloride P-selling more than a dozen provinces and cities nationwide, autonomous regions and exported to Europe, Southeast Asia and Taiwan, production and sales and market share in the same industry in the country ranked the top three, Jianping people adhere to the "credibility first, customer first, service first" operating purposes, warmly welcome customers at home and abroad to discuss cooperation with our company.

公司与中科院化学研究所、南京工业大学化工学院有着良好的技术合作，产品质量能满足不同客户的要求，尤其高含量、低砷、低铅、低铁的三氯化磷、三氯氧磷畅销全国十几个省市、自治区及出口到欧洲、东南亚和台湾地区，产销量和市场占有率在全国同行业中居前三甲，建平人恪守"信誉第一、顾客至上、服务至上"的经营宗旨，热忱欢迎国内外客户与我公司洽谈合作。

This paper is in view of low pressure, low production and downhole throttle characters of SuLiGe gas field, developed the research of the foam drainage technology, aim of deceling the loss of wellhole pressure and triturate a new low density foaming agent successfully, solved the welldown liquid loading issue of SuLiGe gas field.

本文针对苏里格气田低压、低产和井下节流井的特点，开展了泡沫排水采气工艺研究，以降低井筒压力损失为目的，研制成功了一种低密度起泡剂，解决了苏里格气田气井积液问题。

In recent years, with the advanced requirements for speedup and heavy load from rail transport, the advanced requirements for the property of supporting pedestal have been proposed. The inherent defectivenesses which include the low mechanical property, low fatigue ductility and low shock resistance of cast-steel product, and the avoidless gas cavity, shrinkage porosity, inclusion, crack, etc in cast-steel product, existed in the product of Cast-steel supporting pedestal, have threatened the high speed and safe running of railroad.

近年来，随着铁路运输对重载、高速要求的提高，对关键部件支撑座的性能要求也在提高，铸钢支撑座产品存在的固有缺陷(铸钢件本身的机械性能、疲劳韧性、抗冲击性能都不高，铸件产品无法避免地存在气孔、缩松、夹杂、裂纹等)对铁路高速安全运行已构成威胁。

The titanomagnetite is characterized by low content of chadacryst minerals, high content of iron and low content of titanium, therefore high quality vanadium-iron concentrate with high iron and low titanium could be obtained.

钛磁铁矿具有客晶矿物含量低、铁高钛低的特点，可获得高铁低钛的优质钒铁精矿。

The biomarkers such as the n-Alkanes, the isoprenoids, the terpane, and cholestane were detected through GC-MS analysis. Based on the study of the biomarkers, the biological evolution during Permian and Triassic can be divided as three stages, namely, the mixing source stage of low biota such as thallose and advanced plant in late Permian (below bed 63), the stage of low biota such as thallose in the boundary transitional layer (bed 63-69) and the mixing source stage of advanced plant and low biota such as thallose in early Triassic (above bed 69). What's more, the second stage near the boundary transitional layer can be subdivided into 4 stages. The stages of biota evolution is close related with sedimentary environment changing and the boundary transitional layer.

利用GC—MS分析技术，在陆相地层中检测出正构烷烃、类异戊二烯烷烃、萜烷和甾烷类生物标志化合物并根据生物标志化合物和特征值研究，将二叠系—三叠系生物演化划分为三个大的阶段，即晚二叠世的菌藻类低等生物与高等植物混源阶段（63层以下），界线异常层的菌藻类低等生物阶段（63-69层）和早三叠世高等植物与菌藻类低等生物混源阶段（69层以上），界线附近异常层的第二阶段又进一步细分为4个次一级阶段，生物演化阶段与沉积环境变化及界线异常层具有非常密切关系。

FEATURES Clickless Bilateral Audio Switching Guaranteed Break-Before-Make Switching Low Distortion: 0.003% typ Low Noise: 1 nV/Hz Superb OFF-Isolation: 120 dB typ Low ON-Resistance: 60 typ Wide Signal Range: VS = 18 V; 10 V rms Wide Power Supply Range: 20 V max Available in Dice Form

特点无杂音双边音频切换保先断后接开关低失真：0.003％典型值低噪声：1纳伏/赫兹卓越的隔离性：120分贝典型值低导通电阻：60典型宽信号范围：比= 18伏； 10 V RMS的宽电源电压范围：20 V的最大可用表格中骰子

Based on the problems of low viscosity index and the acidity increasing in the lubricating base oil,it has been found that the unstable quality of the crude oil was the root cause to effect on the quality of the base oil by analysis for long time;the low viscosity index and the higher acidity were resulted from the low paraffinicity and the high content of aromatics,cyclane.

针对润滑油基础油相继出现的黏度指数降低、酸值升高等问题，跟踪分析了润滑油基础油质量，认为原油的变化是造成润滑油基础油质量变化的根本原因；基础油组成中烷烃含量降低，芳烃和环烷烃含量上升是其酸值上升和黏度指数下降的内在原因。

Results The splenic infraction was showed triangular or unr egular low density regions which had no enhancement,Metastasis tumor of spleen had imaged cystiform low density single or several masses,The patho logicai presented little nodular or circle enhancement.Primary lymphoma of spleen had presented part range low density regions and uneven enhancement .

结果 脾梗塞呈三角形或不规则形低密度区，病变无强化；脾转移瘤为囊状低密度肿块，单发或多发，病灶呈小结节状或环形强化；脾原发恶性淋巴瘤，呈局灶性低密度区和不均匀强化。

Numerical experimental results showed that the perimeter air deflectable deposited burner could ensure the flame stability to satisfy combustion requirements under low load and can prevent spout fire carrying, low concentration of particle matters around the water-wall ensures the water-wall to be in oxidation atmosphere to solve problems of high temperature erosion and slagging, and particle matters separated from main spray caused by deflectable deposited perimeter air plays a significant role in low NO combustion control.

数值试验结果表明，偏置周界风燃烧器在保证煤粉气流着火稳定性以满足低负荷燃烧要求的同时，具备较强的防止喷口带火能力；炉内水冷壁附近颗粒物质量分数相对较小，从而能保证较高的氧化性氛围以解决水冷壁高温腐蚀、结渣等问题；偏置周界风所引起的炉内气固两相偏析在低NO燃烧控制方面具有重要意义。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。