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It is mainly by analyzing the features of sediment concentration distribution in vertical in this paper, and then the problems of effect of headwork gates on sediment prevention, relation between distribution of sediment deposition in irrigated areas and
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本文主要从分析计算含沙量沿垂线分布特点，探讨渠首防沙的作用，分析灌区泥沙淤积分布特性与泥沙处理利用的关系，分析计算引水引沙对黄河下游河道冲淤影响及入渠泥沙的处理利用等问题。 |
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It is mainly composed of the following parts or materials: a cast iron disc, heating element,insulation material, and a reflection-proof cover.
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其中发热体包裹在绝缘材料内，同时绝缘材料被封装在铸铁盘内，并用反射防护罩隔离保护。 |
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It is mainly engaged in design, development and manufacture of portable PC, medium and large sized computer, high-quality server, and advanced electronic components.
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目前主要从事数字家电等消费类电子产品的研发和生产。 |
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It is mainly found in places where there is starch.
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负趋光性，夜晚出来活动。 |
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It is mainly highlighted in no vibration, low noise, no pollution and high efficiency.
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施工中无震动.低噪音.施工无污染，成孔效率高是其主要特点。 |
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It is mainly introduced the protection configuration and the concerted relationship for the power supply system of Shenzhen metro vehicles at the 1(superscript st) stage.
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摘要主要介绍了深圳地铁一期工程牵引供电系统保护配置及配合关系。 |
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It is mainly made of reinforced PP with short time of self-priming and long life, a kind of zero-leakage pump for automation long distance control and fluid transmission of strongly corrosive liquid.
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该泵以增强聚丙烯为主要材料，自吸时间短、寿命长，是自动化远程控制和流动输送强腐蚀液体的无漏泵。 |
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It is mainly produced in Sichuan, Yunnan and Guizhou provinces. Other producing regions include Northeast China and North China.
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主产于四川﹐云南﹐贵州等省。东北部与北部亦有出产。 |
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It is mainly synthesized by two chemical ways: ring-opening polymerization and direct polycondensation.
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合成聚苹果酸的化学方法主要有开环聚合法与直接聚合法。 |
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It is mainly the government's obligation, and the society as its supplement.
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法律援助是政府的责任，以社会法律援助作为补充。 |
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It is mainly used as cut-off valve and also can be designed as regulating or cut-off / regulating combined valve. currently , butterfly is mainly used in the low pressure large size pipelines.
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在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°~90°之间，旋转到90°时，阀门则牌全开状态。 |
