电磁驱动气门机构
solenoid-actuated valve system
可变气门驱动机构
variable timing valve actuators
发动机气门间隙调整
engine valve lash adjustment
发动机气门间隙调整专题
engine valve lash adjustment topic
电动气动接触器
electropneumatic contactor
卷扬机直接驱动式升降设备
direct lift winch equipment
直接驱动式涡轮发电机
direct-connected turbo-generator