chemical constitution

The reasons of appearance different phases among base metal, welded seam and heat-affected zone are different chemical constitution proportion of base metal and welding wire and part of metallic elements are melting loss when welded.

母材和焊缝、热影响区出现不同相的原因是由母材与焊丝所含化学成分的比例不同及焊接时部分金属元素烧损所致。

Chemical constitution and microscopic pattern of the inorganic filler in a corona resistant magnetic wire insulating coating was tested and analyzed.

测试和分析了某型耐电晕电磁线绝缘漆中无机填料的化学组成和微观形貌，并测试该电磁线绝缘漆的紫外可见光吸收谱。

AIM: To investigate the present state of physical constitution of students in Liaoning University of Petroleum and Chemical Technology, and to evaluate their health level scientifically.

目的：了解辽宁石油化工大学学生的体质现状，对其健康水平做出科学评价。

Organic flour-compound material demonstrates excellent chemical stability and low superficiality because of its special chemical constitution.

含氟 材料由于其本身特殊的化学结构而表现出优异的化学稳定性和低表面能特性,应用前景广阔.

A Study on the Change of Chemical Constitution of Acrylonitrile/ Diacetone Acrylamide/ Methyl Acrylate Copolymers during Thermal Stabilization by In-situ Infrared Spectroscopic Method

原位红外光谱法研究丙烯腈/二丙酮丙烯酰胺/丙烯酸甲酯共聚物热稳定化期间化学结构的变化