发动机起动延时继电器
time delay engine start relay
柴油发动机冷起动加热器
diesel engine cold start heater
起动电动机安装组件
starter motor mounting group
空气压缩机无负荷起动电磁阀
no-load starting electromagnetic valve of air compressor
风力机起动风速
wind speed for wind turbine start-up
电动机软起动学科
Learning-branch of motor soft starting
电动机起动特性
starting characteristics of motor