新型电梯电缆
new kind of elevator cable
BDD-2型电缆半导电电阻测量装置
BDD-2 Test Apparatus for resistance measurement for the semicondutive layer in cables
OTIS电梯用钢丝绳
wire rope for OTIS elevator
按钮自动控制电梯
automatic push button control lift
半导电电缆纸
Semiconducting electric cable paper
爆电电源
ferroelectric power supply
避雷器放电电压-时间曲线
arrester discharge voltage-time curve
避雷器振荡火花放电电压
arrester alternation sparkovervoltage
arrester alternating sparkover-voltage
便携式电梯维护控制器
Portable Controller for Elevator Maintenance
标称放电电流
nominal discharge current
nominal discharging current
norminal discharge current