primary metal

The major aging problems in a PWR plant and their assessment technologies were summarized as the radiation embrittlement of reactor pressure vessel materials, thermal aging of cast stainless steel, stress corrosion cracking of steam generator tubing and metal fatigue in primary circuit of a PWR plant.

主要的老化机理有反应堆压力容器的辐照脆化、铸造不锈钢的热老化、蒸汽发生器传热管的应力腐蚀开裂和金属疲劳。因而可能是一种潜在的辐射防护剂。

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The appropriate tapping temperature and composition, designed for primary melting GH1040 base metal in arc furnace, provide necessary energy for VOD refining.

设计的初炼炉出钢成分及其出钢温度，为GH1040母材在VOD精炼过程中提供了所需要的热能。

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When buying metal gutters, choose the thickest metal available and look for primary or virgin materials.

当购置金属水槽, 最厚的金属可供选择,并等待为小学或原生资料.

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Combining the practical state of the university, the primary exploration and practice were conducted for synthesis experiments of fundamental chemistry of chemical engineering and non-metal materials theoretically and in practice and good effects were reached.

文章结合本校的具体情况，从理论和实践上对化学化工及非金属材料类专业大学本科生的基础化学综合实验进行了较为深入的探索与实践，并取得了比较理想的效果。

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Has a primary metal D-level 2653.55 tons of diabase rich in mineral resources and mineral resources.

拥有原生的锡金属D 级 2653.55吨矿藏资源和丰富的辉绿岩矿产资源.

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The major primary metal minerals of ore are chalcocite and bornite, and the secondary metal minerals are malachite and azurite, etc. Ore texture and structure are simply, the ores are mainly in granular crystalline and dissolution textures and infection cementation structures.

矿石主要原生金属矿物为辉铜矿和斑铜矿，次生金属矿物主要为孔雀石等。矿石结构构造比较简单，主要为结晶粒状及溶蚀结构和侵染状胶结构造。

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Primary Study of Heavy-metal Contamination of Soil in Abandoned Mine of Lianhua Mountain

莲花山矿山土壤重金属污染初步调查

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Primary: jewelry accessories, supplies, clothing, toys, metal products, plastic products, Fashion Accessories, other models toys resin handicrafts, Other technology used metal tools Jewelry.

主营：饰品配件、服装辅料、玩具、五金制品、塑料工艺品、时尚配饰、其他模型玩具、树脂工艺品、其他工艺用五金工具、金银珠宝首饰。

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The cross-well logging technique of measuring electric resistivity of stratum through metal casing has wide foreground, but it is still in the primary stage of investigation and exploiture.

在套管井中实现井间地层电阻率的测量具有很广阔的应用前景，但该技术在国内外仍处于研究和开发阶段。

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Ms Carroll has been working for Alcan since 1988 and has run most of the group's divisions, including raw materials, packaging and primary metal.

自1988年以来，卡罗尔一直在加拿大铝业供职，曾主管过该集团的多数部门，包括原材料、包装和原生金属等。

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