The technology, equipment and features of push-pull strip steel pickling line is introduced, its problems in production analyzed and discussed.
介绍了推拉式带钢酸洗线的工艺、设备组成及特点，对推拉式酸洗机组在生产中存在的问题进行了分析和探讨。
It is applies Granger causality tests to test the causes of China technology markets growth according to technology demand pull and technology push theories.
采用格兰杰因果分析法，依据需求拉动和技术推动理论，对中国技术交易规模扩张的原因进行了实证检验。
It is a key problem for information service that researching of pull-push technology and obtaining information intelligently.
研究更为完善的推拉技术、更方便和智能的信息获取方式是图书馆信息服务中的重要课题。
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