风雷棋牌

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                    • 钢丝绳有哪些捻法

                      2012-11-8 21:37:09 人气: 来源:钢绳:http://

                      钢丝绳有哪些捻法

                      (1)分类见表7-172。
                                                
                      图7-1钢丝绳的四种捻法
                      钢丝绳 - 钢绳

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