This process specification provides for rated voltage 450/750v, single core 1.5-500mm2 PVC insulated or polyolefin insulated flame-retardant fire resistant soft cable; And 0.6/1kv single core 4~500mm2, 2~5 cores 1.5~240mm2 polychlorinated insulated or polyolefin insulated flame-retardant fire resistant flexible cables process specifications, technical re, and acceptance rules. The main models of this process specification are: rated voltage 450/750v: za-rv; WDZA - RY, etc. Rated voltage 0.6/1kv: za-rvv, za-rvv22, wdza-ryy, wdza-ryy23, wdna-ryy, wdna-ryy23. 2? Usage characteristics, classification and nomenclature of cables 2.1? Service characteristics 2.1.1 cable rated operating voltage: 450/750v, 600/1000v. 2.1.3 temperature under installation should not below 0 ℃. 2.1.4 small bending radius of cables: unarmored cables: the flame retardant type is 6 times the outer diameter of cables, and the fire resistant type is 12 times the outer diameter of cables; The armored cable is 20 times the outer diameter of the cable. 2.2? The cable type consists of 5 parts: serial code, insulation, sheath material code, outer sheath and performance code.
2.电缆敷设安装允许弯曲半径：非铠装层电缆应不小于电缆外径的6倍；铠装或屏蔽层结构电缆应不小于电缆外径的12倍；屏蔽层结构的软电缆应不小于电缆外径的6倍。
电缆地线芯绝缘采用具有抗氧化性能的K型B类低密度聚乙烯。
HYA53/HYAT53（防鼠咬/直埋）HYAT53直埋型电缆主要用于传输音频、15市内通信电缆|通信电缆|（管道/架空）HYAC（架空 ）HYAT（防水）0kHZ及以下的模拟信号和2048kbit/s及以下的数字信号。
对有屏蔽层结构的软电缆，应不小于电缆外径的6倍。
对无铠装层的电缆应不小于电缆外径的6倍。
橡套软线-YZ型橡套电缆用途：本产品适用于交流额定电压450/750V及以下家有电器、电动工具，各种移动式电器设备和电焊机与焊钳的连接线路。
HJVV, HJVVP, HPVV communication cable: mainly used for transmitting audio, 150kHZ and below analog 2048kbit/s and below. Under certain conditions, it can also be used to transmit Numbers over 2048kbit/s. Used for short distance transmission. New sales department of our factory, micro: ? ? is not convenient to contact! ? HJVV, HJVVP, HPVV communication cable is introduced: used for distribution frame or switch to switch the internal connection between the device (including rural telephone bureau), such as the beginning of the line and terminal, for connecting the city telephone cable to the junction box or distribution frame, inner conductor wire diameter (mm) : 0.40, 0.50, 0.60, 0.70, 0.80, 0.90? Logarithm (yeah) : 5-1000? HPVV low frequency communication distribution cable distribution cable Broadband/product use: suitable for transmission between remote optical network units and users, and between buildings in building wiring. The high transmission is 30MHz and 100MHz respectively.
51系列单片机有5个中断源，其中有2个是外部输入中断源INT0和INT1。
可由中断控制寄存器TCON的IT1（TCON.2）和IT0（TCON.1）分别控制外部输入中断1和中断0的中断触发方式。
若为0，则外部输入中断控制为电平触发方式；若为1，则控制为边沿触发方式。
这里是下降沿触发中断。
问题的引出几乎国内所有的单片机资料对单片机边沿触发中断的响应时刻方面的定义都是不明确的或者是错误的。
文献中关于边沿触发中断响应时刻的描述为“对于脉冲触发方式（即边沿触发方式）要检测两次电平，若前一次为高电平，后一次为低电平，则表示检测到了负跳变的有效中断请求信号”，但实际情况却并非如此。
YJV22交联聚乙烯绝缘钢带铠装聚氯乙烯护套电力电缆型号名称使用条件VV23聚氯乙烯绝缘钢带铠装聚乙烯护套电力电缆同VV22，YJV22YJV23交联聚乙烯绝缘钢带铠装聚乙烯护套电力电缆VV32聚氯乙烯绝缘细钢丝铠装聚氯乙烯护套电力电缆敷设在地下，竖井、水下，能承受较大拉力。
型号产品名称电压V芯数截面mm2主要适用范围KVV阻铜芯聚氯乙烯绝缘聚氯乙烯护套kvv电缆450/.75-10敷设在室内，电缆沟、管道等固定场合KVV22铜芯聚氯乙烯绝缘聚氯乙烯护套钢带铠装kvv22电缆450/.75-10敷设在室内，电缆沟、管道直埋等能承受较大机械。
该电缆主要用于交流或直流300V及以下的工作系统，在500V及以下时能正常工作。
MKVV芯)×（0.75-2.5mm2）煤矿用铜芯聚氯乙烯绝缘聚氯乙烯护套钢带铠装阻燃矿用控制电缆敷设在室内、电缆沟、管道、直埋等能承受较大机械拉力的固定场合。
DJYVP3－22 聚乙烯绝缘对绞铝塑复合带总屏蔽聚氯乙烯护套钢带铠装计算机电缆 敷设室内、电缆沟、管道等要求静电屏蔽并承受较大机械外力固定场合。
DJYP3VP3－22 聚乙烯绝缘对绞铝塑复合带分屏蔽及总屏蔽聚氯乙烯护套钢带铠装计算机电缆 敷设室内、电缆沟、管道等要求静电屏蔽并承受较大机械外力固定场合。
煤矿用阻燃信号电缆(现统称煤矿用阻燃通信电缆)MHYVR（PUYVR）：聚乙烯绝缘聚氯乙烯护套矿用信号电缆，用于矿场作普通信号传输，可移动使用。
MHY32（PUYV39-1）：聚乙烯绝缘钢丝铠装聚氯乙烯护套煤矿用信号电缆，用于平巷或竖井或斜井作信号传输。
HYAT53：铜芯实心聚烯烃绝缘填充式挡潮层聚乙烯护套钢塑带铠装聚乙烯护套市内通信电缆。
HYA22：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装聚氯乙烯护套市内通信电缆。
HYA23：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装聚乙烯护套市内通信电缆。
井道的顶部和底部设有冲顶及蹲底的缓冲设备。
轿厢中设有自动门机，用来完成电梯的开门及关门任务。
电梯门分厅门及轿门，当电梯停靠某层时，此层的厅门在轿门的带动下开启及关闭。
电梯的操纵箱也安装在轿厢内，供司机及乘客发布动作命令。
上面设有与电梯层站数相同的内选层按钮（带内选指示记忆灯），上下行启动按钮（带上下行指示记忆灯），开关门按钮，急停按钮，风扇、照明、楼层指示灯的控制开关，电梯运行状态选择钥匙开关（选择电梯是自动运行、司机状态下运行，还是检修状态等）。
3.电缆允许弯曲半径：单芯电缆最小为电缆外径的20倍，多芯电缆不小于电缆外径的15倍。
＊最小弯曲半径：无铠装电缆应不小于电缆外径6倍；有铠装电缆应不小于电缆外径12倍3、用途：＊适用于交流额定电压uo/u为450/750v及以下的控制，监控回路及保护线路。
And this cable factory's communication cable production plant distributed throughout the country. Words in China in addition to the production of long distance communication cable and cable, fiber optic cable and comprehensive covering all plastic city for polyolefin insulated cable also had great development, many domestic manufacturers and research institutes to introduce technology and e from abroad to start producing. Welcome to contact us!
Performance of variable frequency cable: 1. Bryjvp12r-tk and zrbpyjvp12r-tk are designed with type 5 soft twisted copper conductor in accordance with GB/ t. 2. Crosslinked polymer insulation, good temperature and weather resistance. 3. Low transmission impedance and good electromagnetic compatibility. 5. Good resistance and low radiation performance. 6. Symmetrical three-core cable structure design, with better transmission performance than four-core cable.
五、规格范围型号标称截面（mm2）0.50.75芯数 KVV KVVP2-KVVP24-KVV227-6 KVVR4-61 KVVRP4-61。