#ArborDay #TreePlantingDAY #312 #植树节 Today is a good day, we did some tests on the safety light curtain sensor and planted trees. Spring is the best time for tree planting. In China, Arbor Day falls on March 12th. Have you ever participated in Tree Planting Day? #SAIER #sensorfactory #switchmanufacturer #proximityswitch #solenoidvalve #safetylightcurtainsensor #lightbeamcurtainsensor #curtainsensor #opticalsensor #photoelectricsensor
