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Old 08-28-2008, 05:08 AM
Dash Dash is offline
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Default books on hair care ingredients? ?

What are some good books on hair care ingredients, preferably, ones that emphasize the benefits of natural and alternative ingredients?


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Old 08-30-2008, 02:11 PM
fghi222 fghi222 is offline
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Post 铜铸钢

铜包钢接地棒 铸铜接地棒   铸铜接地棒是用特殊的电铸技术将99.9%的纯铜均匀覆盖到低碳钢芯上,使铜与钢芯完全分子结合(如两 者结合不密,在通电的情况下,会产生原电池反应,阳极金属铁发生氧化反应变成铁离子流失,反而加快钢芯受蚀 )。它具有铜层厚(0.25毫米以上)、粘合度好、不剥离(可轧制螺纹)等特点。它的优点是抗拉强度大(高 大600牛顿/平方毫米),耐腐蚀性强(可保证使用寿命在50年以上),有恒定的低电阻及良好的可塑性,既有与铜等同的性 能又兼有钢材特性。  铸铜接地棒,深埋地下后无论是自然腐蚀还是电化学反应,都有极强的保护性。接地棒与 接地连线采用我司生产的热熔焊剂焊接,使接地装置完全处在铜的保护之下,成为真正的免维护接地装置。  铸 铜接地模块配有同轴连接器、驱动头和钻头等配套件。根据不同地质及使用要求可以通过采用黄铜同轴连接器(连 接螺栓)连接,任意增加铸铜接地棒的长度。项端采用驱动头(连接螺栓)连接,供棒打深时打击使用。末端采用 特制钻头(连接螺栓)连接,以便于将棒打深。 铜包钢接地极是由纯度为99.9%的电解铜分子覆盖到低碳钢芯上制成的,镀铜层厚度为0.25mm,具有很 强的耐腐蚀性,同时使用的钢具有高达600N/mm2的抗拉强度,接地极两端的螺纹可以使安装人员很方便的通过连接器将连接为一定长度,以达到更低的接地 电阻。 我公司应用全新工艺生产的铜包钢,镀铜钢是一种新型的金属复合材料,它既有铜的良好导电性又有钢的强度,且 具有极强的防腐性能。本公司在同行业中率先通过ISO9001~2000质量管理体系认证、经国家技术监督 局检验为全部合格产品。
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