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    Copyright ? 2017 FUYU All rights reserved. 富余電纜 版權所有
    中華人民共和國電信與信息服務業務經營許可證 編號:
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    手機版官網

    please try againinclude error,path:/comp/breadcrumb/nav?compId=breadcrumb_nav-1538989252773 cause:org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.RuntimeException: org.springframework.transaction.TransactionSystemException: Could not commit JDBC transaction; nested exception is java.sql.SQLException: Unknown error%!(EXTRA string=invalid protocol version: 255) org.springframework.transaction.TransactionSystemException: Could not commit JDBC transaction; nested exception is java.sql.SQLException: Unknown error%!(EXTRA string=invalid protocol version: 255) at org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:275) at cn.ce.ebiz.framework.persistence.mybatis.DataSourceTransactionManagerExt.doCommit(DataSourceTransactionManagerExt.java:55) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730) at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:483) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:290) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) at com.sun.proxy.$Proxy92.findPages(Unknown Source) at com.alibaba.dubbo.common.bytecode.Wrapper137.invokeMethod(Wrapper137.java) at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:45) at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:71) at com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:48) at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:52) at cn.ce.ebiz.framework.remoting.DubboContextFilter.invoke(DubboContextFilter.java:220) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:61) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:41) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:74) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:77) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:71) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:131) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:37) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:37) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68) at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:98) at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:96) at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:168) at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:50) at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:79) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: java.sql.SQLException: Unknown error%!(EXTRA string=invalid protocol version: 255) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2530) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2491) at com.mysql.jdbc.ConnectionImpl.commit(ConnectionImpl.java:1555) at com.mchange.v2.c3p0.impl.NewProxyConnection.commit(NewProxyConnection.java:803) at org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:272) ... 42 more

    產品及應用

    不同的環境下,該如何來選擇電纜橋架?

    分類:
    新聞中心
    2020/09/23 11:47
    瀏覽量
    【摘要】:
    什么樣的環境下用什么類型的電纜橋架,這是非常重要的問題。電纜橋架需要考慮兩個重要指標:電纜橋架的承載能力應滿足工作均布載荷小于額定均布載荷,電纜橋架應能適應不同的環境要求和有較長的使用壽命。目前通常的做法是:電纜橋架的承載能力是通過選擇適當厚度的材料來滿足,環境要求和使用壽命是通過選擇相應的原材料來滿足。

    什么樣的環境下用什么類型的電纜橋架,這是非常重要的問題。電纜橋架需要考慮兩個重要指標:電纜橋架的承載能力應滿足工作均布載荷小于額定均布載荷,電纜橋架應能適應不同的環境要求和有較長的使用壽命。目前通常的做法是:電纜橋架的承載能力是通過選擇適當厚度的材料來滿足,環境要求和使用壽命是通過選擇相應的原材料來滿足。其中:

     

    1、槽式電纜橋架。

     

    槽式電纜橋架是一種全封閉型電纜橋架,它適用于敷設計算機電纜、通信電纜、熱電偶電纜及其它高靈敏系統的控制電纜的屏蔽干擾和重腐蝕環境中電纜的防護。

     

    2、托盤式電纜橋架

     

    托盤式電纜橋架具有質量輕、載荷大、造型美觀、結構簡單、安裝方便等優點,它既適用于動力電纜的安裝,也適用于控制電纜的敷設。

     

    3、梯級式電纜橋架

     

    梯級式電纜橋架適用于直輕大電纜的敷設,特別適用于高、低壓動力電纜的敷設。

     

    4、組合式電纜橋架

     

    組合式電纜橋架能夠根據安裝場所的實際情況,隨意組合,適用于安裝環境較為復雜,對橋架走線槽空間變化有較多要求的場合。

     

    5、大跨距電纜橋架

     

    大跨距電纜橋架適用于受安裝場所條件限制,不能設置較多托臂、吊架,要求橋架必須要有較大支吊跨距的場合選擇。

    4887铁算是盘小说