Page touch the NC (Normally Close) is usually closed by touch in touch this page; to COM (Common), and legs to float or not to touch each other when an electric current flowing through the coils touch page NO (Normally Open) as a normal page, touch to open a floating State. Not be connected to the COM (Common), but the legs are connected when power is flowing through the coil legs COM (Common) as the leg that is shared between NC and NO pumping Pump function by going to ยวาล์ว and recycling solutions through sprinklers to water the trunk and roots.
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