《机械设计基础》教案十二.pdf

浙江工业职业技术学院日期：2009.10 NO12 课题 7.3 螺纹联接强度的计算目的要求1掌握普通螺栓联接强度的计算方法。2熟悉铰制孔用螺栓联接强度的计算方法。重点、难点紧螺栓联接强度的计算是重点，也是难点。复习提问要点：1、何谓松螺纹联接？2、何谓紧螺纹联接？3、铰制孔用螺栓联接与普通螺栓强度计算有何区别？教具、实验及教学手段教材、教案、教参等。老师讲解为主（举例、介绍经验），举一反三，课后小结，布置作业。作业布置P57：7-6、7-16 教学反映上课与作业情况均正常，个别同学作业中出现一些问题，主要一是上课内容还没有完全吃透，二是实践经验较缺少。课后分析本次课内容较多，螺纹联接强度的计算，特别是普通螺栓联接强度的计算，在教学中是重点，也是难点，在讲课过程中不能操之过急。在紧螺栓联接中既要考虑轴向拉力所引起的拉应力，又要考虑由于摩擦力矩所引起的切应力。复习提问：1、常用螺纹的类型和应用2、螺纹联接的结构新课导入：螺栓联接强度计算，主要是确定螺栓的直径或校核螺栓危险截成的强度。7.3 螺纹联接的强度计算一、普通螺栓联接的强度计算（一）松螺栓联接强度的计算松螺栓联接工作时只承受轴向工作载荷F，其螺栓强度校核与设计计算公式为：4/21dFFd41F 为轴向工作载荷（N），d1为螺栓小径（mm），图 13-1 松螺栓联接为螺栓材料许用拉应力（Mpa）。（二）紧螺栓联接的强度计算1、受横向工作载荷的紧螺栓联接横向工作载荷 FR，预紧力0F所产生的摩擦力应大于或等于横向工作载荷RF，即 FfmRF引入可靠性系数fK，则0FfmFKRf图 13-2受横向载荷的普通螺纹联接fK=1.11.3，f为摩擦系数，对于干燥的钢铁件表面，f=0.10.16，m 为螺栓接合的数目。0FfmFKRf=RRFF7115011螺栓受预紧力0F引起的拉应力外，还受螺旋副中摩擦力矩T 的切应力 的作用。对于 M10-68 的普通钢制螺栓，5.0，根据第四强度理论，3.1e。则螺栓强度校核与设计计算公式为文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E64/3.1210dFe012.5Fd由以上分析，当螺栓连接承受横向载荷RF，要要使连接不发生滑移，螺栓要承受 7 倍的横向载荷的预紧力，这样设计出的螺栓结构笨重、尺寸大，不经济，因此应设法避免这种结构，而采用其他结构。2、受轴向工作载荷的紧螺栓联接图 13-3受轴向载荷的普通螺纹联接螺栓所受总拉力 FQ=F+0FF 轴向工作载荷。0F残余预紧力。一般的连接，若工作载荷稳定，取0F=（0.20.6）F，若工作载荷不稳定，取0F=（0.61.0）F；对于有紧密性要求的，取0F=（1.51.8）F。螺栓强度校核与设计计算公式为：4/3.121dFQeQFd2.51压力容器中螺栓联接，除满足上式外，还要有适当的间距t0要求。dtd730二、铰制孔用螺栓联接强度的计算铰制孔用螺栓联接的失效形式，一般为螺栓杆剪断、螺栓杆或孔壁被压溃。铰制孔用螺栓联接须进行剪切强度和挤压强度的计算。螺栓杆剪切强度条件为文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E624sRdF螺栓杆与孔壁挤压强度条件为pSRpdFRF为单个螺栓所受的横向载荷；ds 为螺栓剪切面直径；为螺栓杆与孔壁挤压面的最小高度；为螺栓许用剪切应力；为螺栓或联接件的许用挤压应力。三、螺栓联接件的性能等级及许用应力1、螺栓联接件常用材料的性能参见教材表7-7 2、一般机械用螺栓联接在静载荷下的许用应力与安全系数参见教材表7-8 参见教材表 3-4 例：如图 3-23 所示，气缸盖与气缸体的凸缘厚度为b=30mm，采用普通螺栓联接。已知气体的压强p=1.5Mpa，气缸内径 D=250mm，螺栓分布圆直径D0=350mm，采用指针式扭力扳手装配。试选择螺栓的数量和直径。解：选择螺栓的材料与性能等级：选45 钢，6.8 级，MPab600；MPaMPas48060080计算每个螺栓的总拉力每个螺栓所受的工作载荷zZZDpF7 3 5 9 442 5 014351422取FF610故ZZFFFFFQ1913447359462610计算螺栓直径与数量由表 3-4 得2S，ZZFdQ333624014319134425251MPa/MPaS/S2402480初选 Z=8，求得mmd85121，选取 M16。校验螺栓分布间距mmdtmax11270，4830dtminmm，mmz/Dt13700maxt0为了保证联接的紧密性，Z 取 12，则mmt920，能满足间距要求，且强度更好，所文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6以选用 12 个 M16 的螺栓。课后小结；1、普通螺栓联接的强度计算2、铰制孔用螺栓联接强度的计算3、螺栓联接件的性能等级及许用应力文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6文档编码:CH1R9D9G1Q2 HE7F4D1K7Q7 ZR10T6Q8B2E6