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谈谈组合机床包装箱底座滑木设计
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作者 祝宏业 邢长鑫 《组合机床与自动化加工技术》 北大核心 1991年第2期45-47,共3页
文章介绍了在设计制作组合机床包装箱时,注意考虑底(?)每根滑木的合理尺寸,以求尽可能地节省木材,达到既省材,又可靠的目的。图3幅,表1个。
关键词 组织机床 包装箱 底座 滑木 设计
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光滑木板材制造方法
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作者 关宏伟 《企业科技与发展》 1997年第1期17-17,共1页
用针叶树木制造合板及LVL(单板层积材料)时,常常因为难以得到光滑的表面而不理想。这是因为普通的针叶树木常有节子和裂纹,因而难以得到具有光滑表面的板材。虽然也有不长节子的原木,但数量太少。完美的南洋木是理想的板材,可是数量少... 用针叶树木制造合板及LVL(单板层积材料)时,常常因为难以得到光滑的表面而不理想。这是因为普通的针叶树木常有节子和裂纹,因而难以得到具有光滑表面的板材。虽然也有不长节子的原木,但数量太少。完美的南洋木是理想的板材,可是数量少价格贵。为了解决这个问题,多年来人们想了不少补救的办法,如把节子部位打开洞,埋入木片的修补法;用表面光滑的MDF(中密度纤维板)贴面的方法等等。但修补法总是留有痕迹,影响外观。MDF贴面法虽然可以得到光滑表面但生产太薄的MDF很难, 展开更多
关键词 中密度纤维板 粘合剂 层压纤维板 光滑表面 板材 滑木 光滑的表面 生产工艺 三聚氰胺树脂 修补法
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框架木箱的结构及受力分析 被引量:2
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作者 许应甲 原川梅 《中国重型装备》 1999年第4期8-14,33,共8页
根据实践经验,对框架木箱的结构及在储存、运输过程中的受力状况及产生破坏的原因进行了分析。并对框架木箱的主要构件——滑木、枕木、立柱、顶盖横梁、粱撑等提供了比较实用的计算方法。
关键词 框架木箱 结构件 受力分析 滑木 枕木 立柱
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First record of Bursaphelenchus rainulfi on pine trees from eastern China and its phylogenetic relationship with intro-genus species 被引量:5
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作者 JIANG Li-qin LI Xu-qing ZHENG Jing-wu 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2007年第5期345-351,共7页
Bursaphelenchus rainulfi isolated from dead pine trees in Zbejiang, China, is described and illustrated. It also provided some molecular characters of the Chinese population, including the PCR-RFLP and sequences of IT... Bursaphelenchus rainulfi isolated from dead pine trees in Zbejiang, China, is described and illustrated. It also provided some molecular characters of the Chinese population, including the PCR-RFLP and sequences of ITS region and D2-D3 expansion region of the large subunit (LSU) rRNA gene. Both the morphological characters and ITS-RFLP patterns match with the original description. The phylogenetic trees based on the 13 sequences of D2-D3 expansion region of the LSU rRNA gene and ITS region of Bursaphelenchus species were constructed, respectively, with the results showing the similar clades. The phylogenetic relationship based on the molecular data is similar to that with morphological characters. This is the first report of the species on pine wood in eastern China. 展开更多
关键词 Bursaphelenchus rainulfi Pine wood Morphology MORPHOMETRICS ITS-RFLP PHYLOGENY
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Structural feature and tectonic evolution of Awati-Bachu area in Tarim Basin
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作者 Zhihong LIU Defeng ZHU +3 位作者 Junyi GAO Xiangmei WU Dongcheng LIN Liguo ZHANG 《Global Geology》 2008年第1期19-24,共6页
The research area is situated in the western part of Tarim basin,which includes Awati depression and Bachu uplifted block. It underwent three times processes of compression in a large scale and a near term extension s... The research area is situated in the western part of Tarim basin,which includes Awati depression and Bachu uplifted block. It underwent three times processes of compression in a large scale and a near term extension since Cambrian. The first compression occurred during Middle Cambrian to Devonian, which formed fault band folds in NW axial direction. They were "under-water uplift"and distributed all over the research area. The second compression occurred in Late Permian and formed fault band folds and a few fault propagation folds in NS axial direction. They are developed near Tumuxiuke fault belt and the northern research area. The western anticline is bigger than the eastern one in extent and size. The third compression occurred during Palaeogene to Quaternary and formed tumuxiuke fault belt and fault propagation folds in NW direction. They are distributed over the south part of the research area. Tumuxiuke fault belt is a big scale dextral reversed strike-slip fault belt; it transformed or destroyed the fold structure of the research area. A short-term extension occurred during Early Permian. Tarim Basin is in the rift forming stage of craton, and there exist widespread basic volcanic rocks, basic intrusive bodies and dikes. 展开更多
关键词 fault band fold fault propagation fold strike-slip fault growth strata Awati-Bachu Tarim Basin
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