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FEM modeling and experimental of NC bending process of thin-wall tube with large diameter and small bending radius;

大口径薄壁小弯曲半径数控弯管有限元建模和实验

Numerical Simulation and Experimental Study on the Forming Process of Large Diameter High Grade Steel Pipe Fittings;

大口径高钢级管件成形工艺数值模拟及实验研究

The applied priority of PP large diameter twin wall corrugated pipes was emphasised.

主要介绍了双壁波纹管及其所用材料的种类并对它们进行了分析比较 ,重点介绍了聚丙烯树脂在大口径双壁波纹管上的应用优势。

The big caliber plastic-coated steel tube has a great need recently,however the cost is very high with the existing technology.

大口径涂塑钢管以现有的技术条件其制造成本极高,通过开发使用专用弹性体涂料,实现了常温制造涂塑钢管。

In the text,a few common big caliber heat meters of different principles and constitute of the thermal energy calculates device was introduced,and the applying circumstance in the concentration heating was also provided.

介绍了几种常见的不同原理的大口径热能表及热能计量装置的构成,以及在集中供热管网中的应用情况,对其检定校准方法进行了详细探讨,提出了提高测量准确度的有效方法,以推动大管道热计量技术在热网的成熟应用。

Determination of Fe,Zn and Mn in Tricholoma Giganteum Fruit Bodies by Flame Atomic Absorption Spectrometry;

火焰原子吸收光谱法测定巨大口蘑子实体中的铁、锌和锰

Determination of arsenic in Tricholoma giganteum by microwave digestion hydride generation atomic absorption spectrometry;

微波消化——氢化物原子吸收法测定巨大口蘑中砷的含量

Analysis of Main Nutrition Components in Tricholoma giganteum Fruitbodies;

巨大口蘑子实体营养成分分析

Design of HDPE speciality resin for double wall corrugated pipe with ultra-large diameter;

HDPE超大口径双壁波纹管专用树脂的设计