The electrical switch directly controls the operation of the electrical equipment. Even in the case where the remote controller can be used for operation, the function of manual direct switch is still indispensable. Since it is manually controllable, its switch position should be suitable for on-site personnel to operate conveniently. In

hot summer, electric fans are indispensable. If the electric fan is arranged too high so that the switch cannot be (screwed or pressed) under normal circumstances, it is obviously inappropriate. In case of emergency, it will also be blocked when the electric fan needs to be turned off immediately.
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