It indicates that the structure of alloy is obviously improved with an amount of ce and trace boron, and the ductility and corrosion resistance also increase.
研究表明，添加适量的稀土铈和微量的硼明显改善了合金的组织，提高了材料的延伸性和耐蚀性。
Result show that the trace boron additive causes the changes in the mode of fatigue crack propagation and its route, so that crack growth rate of 40MnB is lowered.
结果表明，微量合金元素硼改变了裂纹扩展途径和扩展方式，从而降低了疲劳裂纹扩展速率。
Determining the trace Boron in steel with Optical Emission Spectrometry is a method which is rapid, convenient and practical. It has been used for quality control during production.
用光电直读光谱法测量钢中的硼元素，此方法具有操作便利、快速和实用的特点，为炼钢生产过程质量控制提供手段。
This method is characterized by simple operation, rapid determination and accurate measured data, and has been applied in determination of trace boron in geochemical standard sample.
拟定的方法应用于地球化学标样中微量硼的测定，操作简便，结果准确。
Its composition containing: organic humus and nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and iron, copper, zinc, boron, molybdenum and other trace elements.
它的成份含﹕有机腐殖质和氮、磷、钾、钙、镁、硫及铁、铜、锌、硼、钼等多种微量元素。
Recently it has been confirmed that boron is a super trace element for human.
近年来的研究表明，硼为人体必需的微量元素。
Recently it has been confirmed that boron is a super trace element for human.
近年来的研究表明，硼为人体必需的微量元素。
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