应急电路 meaning in Chinese

emergence circuit
scrambler circuit

Method of test for resistance to fire of larger unprotected power and control cables for use in emergency circuits
应急电路中使用的大型无防护电力电电源和控制电缆的耐火性的试验方法
Method of test for resistance to fire of larger unprotected power and control cables for use in emergency circuits ; german version en 50362 : 2003
应急电路中使用的大型无防护电力电缆和控制电缆耐火
Methods of test for assessment of the fire integrity of electric cables - test for unprotected small cables for use in emergency circuits - bs en 50200 with addition of water spray
电缆着火完整性评定的试验方法.应急电路中使用的无防护型小型电缆的试验. bs en 50200外加喷水器
Methods of test for assessment of the fire integrity of electric cables - test for unprotected small cables for use in emergency circuits - bs en 50200 with 930 deg flame and with water spray
电缆着火完整性评定的试验方法.应急电路中使用的无防护型小型电缆的试验. bs en 50200外加930 ?火焰和喷水器