Analysis the basic factor of influencing quantity of expansion joint, including the seismic load and wind load, the calculating formula and measure of expansion amount.

分析桥梁伸缩装置伸缩量的基本影响因素，包括地震荷载和风荷载，国内外伸缩装置伸缩量的计算公式和方法。

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Expanded volume was one of the important factors influencing expanded graphite product quantity.

膨胀容积是影响膨胀石墨产品质量的重要因素。

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Noneffective tillering period, which contributed more than 50% root growth quantity to the accumulated root growth at heading, was the main period influencing root growth accumulation.

但无效分蘖期根系生长量占抽穗期根系累积量的比例平均值皆在50%以上，是影响抽穗期根系累积量的主要生育阶段。

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