假如流量计需求装在个上的测验用具中，那么，这些删具都需求加以阐明：参比规范体系的度等级*少应优于被试设备度等级的倍。在实验时期，电磁流量计流量计的任何凋整都应记载，而且应删定在参比条件下这些调整对陛能的影响，并以输出量程的百分数表明。在上游直管的人口处，液流应呈轴对称，而且没有显着的脉动和旋涡.应当认识到，用于流量丈量的参比规范设备有很多型式，那些直接按质量、长度和时刻等基本单位来丈量的设备通常被称为主基准。
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你有没有出现过因为编程器问题造成产线停工的情况？为什么会烧录不良甚至故障导致产线停滞？究竟是因为没有区分研发型和量产型还是因为编程器本身电源过流保护、过压保护等设计的不完善？我们一起来看看。编程器又称烧录器、写码器，是一种将源程序编译生成的固件烧录到目标芯片上的设备。按烧录方式可分为在板烧写和裸片烧写。在板烧写：也称为ICP烧写，是把芯片焊到PCB板上后再进行烧录；裸片烧写：也称为离线烧录，是把芯片放到夹具上进行烧录，之后再把芯片焊到PCB上。
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一直以来，地震预警作为减轻地震灾害的重要途径备受关注。早在上世纪，地球物理学家研究发现，地震波在地层中的传播速度体在8米每秒以内，而破坏性强的横波和面波传播速度在5米每秒以内。一次地震事件中，距离震中由近及远的区域受到地震波及的时间也依次推延。在震中附近监测到地震发生后，以过地震波传播速度向尚未波及的地方发出预警信号，就能实现有效预警。得益于现代数字强震仪与通讯技术的发展，地震预警技术已经成为现实。
