Design, simulation and realization of power amplifier and low noise amplifier are discussed in this article, including RF amplifiers circuit and DC feed circuit.

With the example of feed circuit and heat exchange oil circuit teaching of the MLS3-170 shearers, the writer introduces methods of classroom teaching.

本文以MLS3&170型采煤机牵引部液压系统补油和热交换油路的讲解为例，介绍液压系统的讲解方法。

By means of analyzing the fast feed circuit of the hydraulic system of KY-120 underground rotary drill, the main factors which affect the service life of feed cylinder are revealed and some suggestions are put forward for the improvement of the fast feed circuit.

从分析KY-120型地下牙轮钻机液压系统的快速推进回路入手，指出了影响推进油缸使用寿命的主要原因，并提出了改进意见。

Analysis and improvement on fast feed circuit of KY-120 underground rotary drill

地下牙轮钻机快速推进回路分析与改进

An inverter ( 23) is connected to a feed circuit between the rectifier and a poly-phase motor ( 25) to convert a direct current in the circuit into the alternating current.

逆变器（23）联接到整流器和多相电动机（25）之间的供电电路，用来将电路中的直流电转换为交流电。

Phase shifting control circuit, first stage and second stage driver and synchronous driver circuit, wire feed circuit preset parameter& display circuit, serial communication circuit and protect circuit are introduced emphatically.

重点介绍了移相控制电路、前后级同步驱动电路、送丝电路、参数预置及显示电路、串行通讯电路和保护电路设计。

The medicinal fungal substance by solid fermentation with some conditions was acted as feed additive, then the effect of medicinal fungal on immune function and growth performance of AA broiler was studied.

再以该真菌发酵物（菌质）作为饲料添加剂试验，研究其对AA肉鸡生长性能和免疫功能的影响。

Preparation and Application of "AA" Feed Additive

AA饲料添加剂的制备

The Growth Kinetics of Cells from Yeast Culture Forage Additive

yeast culture饲料添加剂菌体生长动力学

Effects of soybean-phospholipid as dietary additive on brain monoamine oxidase activity, platelet function and arterial tunica intima in aging rat were studied.

本文观察了饲料添加剂大豆磷脂对老龄大鼠脑组织单胺氧化酶（MAO）活力、血小板聚集功能及主动脉内膜的影响。

Study on Synthesis of Feed Additive-Vitamin K_3

饲料添加剂&维生素K3的合成研究

Urea phosphate is the product of addition reaction between phosphoric acid and urea, and usually obtained from reaction of phosphoric acid [ w ( P2O5)> 40%] with urea. As a fodder additive and a high-concentration compound fertilizer.

磷酸脲是磷酸与尿素的加合产物，通常多用ω（P2O5）>40%的磷酸与尿素反应制得，既是饲料添加剂，又是高浓度复肥，用途广。

Because of the higher specific activity and the better optimal temperature and pH, which are nearly in accordance with the physicochemical conditions of the intestines of monogastric animals, the recombinant a-galactosidase is more advantageous to be used in animal feed additive than the native one.

重组α-半乳糖苷酶的比活性较高，最适温度与最适pH接近动物肠道的生理条件，故重组的α-半乳糖苷酶更有利于作为动物饲料添加剂。

SQA activated prawn nutrient as a green feed additive

SQA对虾活力素绿色饲料添加剂

PAC complex feed additive was used to feed Holstein cows. Results demonstrated milk yield and milk fat content of Holstein cows could be increased 7.62% and 10% with addition 0.4% of PAC complex feed additive.

PAC复合酶饲料添加剂对荷斯坦乳牛的饲喂实验表明，在奶牛饲料中添加0.4%PAC复合酶饲料添加剂可使乳产量提高7.62%，乳成分有所改善，乳脂率提高10%。

Feed additive& Vitamin C ( ascorbic acid)

GB7303-1987饲料添加剂维生素C（抗坏血酸）

EM, which a kind of efficient, safe and environmental protection additives, can be extended and applied in farming of fur animals.

EM是一种高效、安全、环保型的饲料添加剂，可在毛皮动物养殖业中推广应用。

EM as a fodder additive and purifying agent of water quality was added into closed, and semi-closed cement ponds with tiger shrimp ( Penaeus monodon Fabricius) and a cement pond was not supplemented with the EM as a control.

本实验以EM作为饲料添加剂和水质净化剂，采用全封闭、半封闭与传统养殖方式&对照组在实验室水泥池（118d）养殖实验。

It was suggested that 125 mg · kg-1 Zoalene can be used as the growth promoting additive of broilers which is possible to take place coccidiosis.

建议在可能发生鸡球虫病的鸡场推广使用125mg·kg－1球痢灵作为促生长饲料添加剂。

Tea powder can increase the vitamin ( VA, VB1, VB2, VC) content of the chicken.

茶叶渣作为饲料添加剂可增加鸡肉的维生素（VA、VB1、VB2、VC）含量；

Effects of BGB Microorganism Feed Additive on Production Performance of Broilers

BGB微生物饲料添加剂对肉鸡生产性能的影响