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Particularly bearing steel, gear steel, spring steel, the steel mold, seamless steel tubes, and other leading products in domestic and international reputation, there are 35 products were Guoyou, Buyou, provincial distinctions, which, carburizing bearing steel, high carbon Chromium bearing steel and steel gear at the national Jinpai Jiang, single-sided Dual Chamber of flat steel country Silver Spring; GCr15 chromium bearing high-carbon steel products physical quality reached the international advanced level; G20 carburizing steel bearing the identification of Japan and Japan Co., Ltd., That reached the international advanced level, the Beijing plant south of locomotives and rolling stock as Mianjian products;∮ 130 mm specifications over four mooring chain is the only steel through the American Bureau of Shipping, Det Norske Veritas, Lloyd's Register, and other well-known international classification societies of the certification and licensing production of varieties.

特别是轴承钢、齿轮钢、弹簧钢、工模具钢、无缝钢管等主导产品在国内外享有盛誉，有35项产品获国优、部优、省优，其中，渗碳轴承钢、高碳铬轴承钢和齿轮钢分获国家金牌奖，单面双槽弹簧扁钢获国家银奖；GCr15高碳铬轴承钢产品实物质量达到国际先进水平；G20渗碳轴承钢经日本东洋株式会社鉴定，认为达到了国际先进水平，被北京南口机车车辆厂视为免检产品；∮130mm规格以上四级系泊链钢是国内唯一在通过美国船级社、挪威船级社、英国劳氏船级社等国际著名船级社的认证和许可批量生产的品种。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。