1New year address by chief editorLIU Cun-de1-12Main achievements and development strategy of heavy machinery industry in the eleventh five-year plan periodZHANG Wei-xin2-123Development of new automatic feeding slag machine for slab continuous castingLI Xiao-juan, JIANG Zheng-yu, YANG Shao-zhuo13-154Practice of adding driving roller to straightening area of slab continuous caster of HBIS GroupAN Ling-jun, ZHANG Shao-hua, YIN Wen-xiang, LU Dian-hua, MA Qi-yun16-185Research and development of aluminum plate surface treatment and automatic staking-plate production lineXU Hong-jun, GE Yan, WANG Guang-shou, HU Jian-hua, PENG Bing19-21,336Analysis of mechanical property of guide roller system in large ring rolling machineXU Zeng-hai, ZHAO Dong, WANG Qiang, CAI Dong-mei22-267Analysis on reasons of breakout in slab continuous castingMA Yu-tang, WANG Xi-ling, WANG Shou-tian27-308Failure analysis of four-row cylinder rolling bearing for supporting roller of leveling machineZHANG Bo-lin, LI Yi-hu31-339Fatigue failure analysis of universal joint of complex thick plate millXIONG Jie, ZHANG Zhi-zhong, FAN Jian-cheng, LIU Zhong-yuan, SUN Da-le34-3810Study on connecting shaft torque on-line monitoring system of plate straightening machineXIE Shi-hong, NIE Hai-xiong, WANG Xiao-gang, HUANG Qing-xue39-4211Affect of vertical roll groove abrasion on slab cross-section shapeJI Ming, CHEN Zhan-fu43-4512Flying shear for big bar production lineQIN Xu-ri, ZHAO Heng-liang46-4913Optimization of technical parameters and main equipment structure of the square and round billet casterWANG Ai-guo50-5214Analysis on main defects of steel tubes in assel cross-rolling production lineYUAN Lin-lin, SHUANG Yuan-hua, LIU Jiang-lin, PEI Jin-xing53-5715Control of PWM voltage loop based on fuzzy algorithmWANG ZHuo, WANG Tie-guang, CAO Yan58-6116Parameter selection and application of vibration feeder for metallurgical equipmentLI Zheng-ming, LI Jian-feng, SHI Fu-gen62-6517Technical improvement of tilting manipulator for H-shaped steel blooming millCHEN Chuang, QIAO Zuo-ying, GAO Dong, LI Wen, GE Bin66-6918Research and application of processing techniques of improved pattern milling machineLIU Lai-meng70-7219On contributions of a technology firm in enhancing industrial technology——taking application of an innovation in hydraulic system of clay gun as an exampleHU Xue-ping73-75 