A platform door unlocking device of an elevator, wher ein the locking device of a platform door is operated by the driv ing of an actuator for unlocking.是什么意思_A platform door unlocking device of an elevator, wher ein the locking device of a platform door is operated by the driv ing of an actuator for unlocking.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句