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71. | The present situation of investigation on the alloy with high strength and low linear coefficient of thermal |
| 总结了高强度低热膨胀合金研究的国内外现状和达到的水平,对高强度低热膨胀合金将来的研究方向提出了看法。 |
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72. | advantages of special ceramics, including high hardness, good anti-wear ability and small coefficient of thermal |
| 缸套是泥浆泵的主要易损件,由于工作条件十分恶劣,金属缸套不耐腐蚀,使用寿命短,在地层复杂的条件下钻井时,常因更换缸套而影响钻井效率,此项工作劳动强度大。 |
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73. | introduced to use Optical Microscope, Laser computerized particle size analyser,Hot Torsion Tester, Thermal |
| 84年与德国OLREFCO公司技术合作,生产水泥旋窑用镁铬砖及尖晶石砖,并添购光学显微镜、雷射微电脑粒度分析仪、热间抗折试验机、热间荷重软化试验机、 |
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