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煤矿用钻机钻杆自动更换机构分析

煤矿机械 2024年第5期45卷 70-72页

作者：马振纲中煤科工集团重庆研究院有限公司重庆400039 煤矿灾害防控全国重点实验室重庆400039

煤矿用钻机在钻进过程中,钻杆的上杆与下杆都需要人工进行操作。在操作过程中劳动强度大、效率低且存在很大的安全隐患。针对此问题,提出一种自动换杆机构的思路,并对换杆机构的运动学进行可行性分析。

关键词：钻杆自动更换机构分析

Cooperation Benefits Both Sides While Confrontation Harms——Thoughts on Strategic Positioning of Sino-U.S. Relations

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China International Studies 2006年第1期26卷 35-54页

作者： ma zhengang

China's Responsibility and the“China Responsibility”Theory

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China International Studies 2007年第2期27卷 5-12页

作者： ma zhengang President of China Institute of International Studies.

The Western world has never stopped making judgments and comments on China, especially a China in the process

关键词：中国国际问题国际关系社会责任 “中国威胁论” “中国失败论”

30 Years of China’s Diplomacy

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Beijing Review 2008年第52期51卷 14-15页

作者： ma zhengang President China Institute of International Studies

In the three decades since adopting the opening-up policy, China has taken on a new international

关键词： In Years of China’s Diplomacy

Learn from the Past Experience and Lessons and Push *** to a Brighter Future

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China International Studies 2009年第1期29卷 5-6页

作者： ma zhengang President of China Institute of International Studies

The relationship between China and the United States is the most important bilateral relations in the *** being the most complicated relationship,it has been managed as the most successful one in the *** terms of popu... 详细信息

关键词：中国美国外交关系双边关系

Negotiation the Way Out

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Beijing Review 2006年第22期49卷 14-15页

作者： ma zhengang

Problems in the Middle East are intensifying, with the escalating Iran nuclear issue and violence in Iraq in addition to continuing conflict in Israel and the Palestinian territories. The world is wondering, how can stability be brought to the region? ma zhengang, President of the China Institute of International Studies and former Chinese Ambassador to Britain, shares his opinions with Beijing Review reporter Ding Ying.

关键词： In Negotiation the Way Out

CONTRIBUTION GUIDELINES

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China International Studies 2009年第5期29卷 4-15页

作者： ma zhengang President of China Institute of International Studies. President of China Institute of International Studies

The current international situation is volatile and highly complicated with abrupt *** contradictions develop successively,and different challenges present them-selves one after another. Firstly,the world is heavily affected by three big crises *** countries run into great difficulty in economic and social development,and the prospect of the world economy is *** first crisis is related to *** oil price

关键词：中国外交国际形式分析

***:A Sober-Minded Assessment With High Expectations

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China International Studies 2009年第5期29卷 57-75页

作者： ma zhengang is President of China Institute of International Studies.

Whenever a new *** swears in,*** will go through a period of mutual *** this time,after Barack Obama came into the White House there was a good beginning in *** which have remained

关键词：中国期望评估合作伙伴关系美国总统适应期

CONTRIBUTION GUIDELINES

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China International Studies 2010年第5期30卷 4-15页

作者： ma zhengang former Chinese Ambassador to Britain. Chinese Ambassador to Britain

In his article entitled'Big Trouble Brewing in the Hood'published at online Sydney Morning Herald on August 3,2010, Professor John Mearsheimer at the University of Chicago claimed that'the balance of power in Asia is ... 详细信息

关键词：中国竞争悉尼大学军事能力澳大利亚引擎盖芝加哥亚洲