【机械工程】启动（开动）、周期性地

actuation

actuation

manual actuation (manual action)

actuation of contacts due to non-rotatably moving part

actuation of the floor-levelling switch off a lift

casing of switch with a handle serving a purpose other than the actuation, lever switch

actuation time【电】;operating time【电】

spring for actuation of a spring (key) with rings